doc: Update docstrings to have one sentence summary as first line. Update scripts in audio, elfun, general, geometry, and image directories. * scripts/audio/@audioplayer/__get_properties__.m, scripts/audio/@audioplayer/audioplayer.m, scripts/audio/@audioplayer/get.m, scripts/audio/@audioplayer/isplaying.m, scripts/audio/@audioplayer/play.m, scripts/audio/@audioplayer/playblocking.m, scripts/audio/@audioplayer/set.m, scripts/audio/@audioplayer/subsasgn.m, scripts/audio/@audioplayer/subsref.m, scripts/audio/@audiorecorder/audiorecorder.m, scripts/audio/@audiorecorder/get.m, scripts/audio/@audiorecorder/getaudiodata.m, scripts/audio/@audiorecorder/getplayer.m, scripts/audio/@audiorecorder/isrecording.m, scripts/audio/@audiorecorder/play.m, scripts/audio/@audiorecorder/record.m, scripts/audio/@audiorecorder/recordblocking.m, scripts/audio/@audiorecorder/set.m, scripts/audio/@audiorecorder/stop.m, scripts/audio/@audiorecorder/subsasgn.m, scripts/audio/@audiorecorder/subsref.m, scripts/audio/lin2mu.m, scripts/audio/mu2lin.m, scripts/audio/record.m, scripts/audio/sound.m, scripts/audio/soundsc.m, scripts/audio/wavread.m, scripts/audio/wavwrite.m, scripts/elfun/cosd.m, scripts/elfun/sind.m, scripts/elfun/tand.m, scripts/general/accumarray.m, scripts/general/accumdim.m, scripts/general/bitcmp.m, scripts/general/bitget.m, scripts/general/bitset.m, scripts/general/blkdiag.m, scripts/general/cart2pol.m, scripts/general/cart2sph.m, scripts/general/cell2mat.m, scripts/general/celldisp.m, scripts/general/chop.m, scripts/general/circshift.m, scripts/general/common_size.m, scripts/general/cplxpair.m, scripts/general/cumtrapz.m, scripts/general/dblquad.m, scripts/general/deal.m, scripts/general/del2.m, scripts/general/display.m, scripts/general/divergence.m, scripts/general/fieldnames.m, scripts/general/flip.m, scripts/general/flipdim.m, scripts/general/fliplr.m, scripts/general/flipud.m, scripts/general/gradient.m, scripts/general/interp3.m, scripts/general/interpft.m, scripts/general/interpn.m, scripts/general/loadobj.m, scripts/general/logspace.m, scripts/general/methods.m, scripts/general/nargchk.m, scripts/general/narginchk.m, scripts/general/nargoutchk.m, scripts/general/nextpow2.m, scripts/general/nthargout.m, scripts/general/num2str.m, scripts/general/pol2cart.m, scripts/general/polyarea.m, scripts/general/postpad.m, scripts/general/prepad.m, scripts/general/profile.m, scripts/general/quadgk.m, scripts/general/quadl.m, scripts/general/quadv.m, scripts/general/randi.m, scripts/general/rat.m, scripts/general/repmat.m, scripts/general/rot90.m, scripts/general/rotdim.m, scripts/general/saveobj.m, scripts/general/shift.m, scripts/general/shiftdim.m, scripts/general/sortrows.m, scripts/general/sph2cart.m, scripts/general/structfun.m, scripts/general/subsindex.m, scripts/general/trapz.m, scripts/general/triplequad.m, scripts/geometry/delaunayn.m, scripts/geometry/dsearch.m, scripts/geometry/dsearchn.m, scripts/geometry/griddata.m, scripts/geometry/griddata3.m, scripts/geometry/griddatan.m, scripts/geometry/inpolygon.m, scripts/geometry/rectint.m, scripts/geometry/tsearchn.m, scripts/geometry/voronoi.m, scripts/geometry/voronoin.m, scripts/help/__unimplemented__.m, scripts/help/doc.m, scripts/help/doc_cache_create.m, scripts/help/get_first_help_sentence.m, scripts/help/help.m, scripts/help/lookfor.m, scripts/help/print_usage.m, scripts/help/type.m, scripts/help/which.m, scripts/image/autumn.m, scripts/image/bone.m, scripts/image/brighten.m, scripts/image/cmpermute.m, scripts/image/colorcube.m, scripts/image/contrast.m, scripts/image/cool.m, scripts/image/copper.m, scripts/image/cubehelix.m, scripts/image/flag.m, scripts/image/gmap40.m, scripts/image/gray.m, scripts/image/gray2ind.m, scripts/image/hot.m, scripts/image/hsv.m, scripts/image/image.m, scripts/image/imagesc.m, scripts/image/imfinfo.m, scripts/image/imformats.m, scripts/image/imread.m, scripts/image/imshow.m, scripts/image/imwrite.m, scripts/image/iscolormap.m, scripts/image/jet.m, scripts/image/lines.m, scripts/image/ntsc2rgb.m, scripts/image/ocean.m, scripts/image/pink.m, scripts/image/prism.m, scripts/image/rainbow.m, scripts/image/rgb2ntsc.m, scripts/image/spinmap.m, scripts/image/spring.m, scripts/image/summer.m, scripts/image/white.m, scripts/image/winter.m: Update docstrings to have one sentence summary as first line. Re-structure to have line lengths <= 80 chars.

--- a/scripts/image/imwrite.m	Fri May 01 21:39:09 2015 -0700
+++ b/scripts/image/imwrite.m	Sun May 03 09:36:20 2015 -0700
@@ -35,17 +35,16 @@
 ## options made during the build of Octave.  Use @code{imformats} to check
 ## the support of the different image formats.
 ##
-## Depending on the file format, it is possible to configure the writing
-## of images with @var{param}, @var{val} pairs.  The following options
-## are supported:
+## Depending on the file format, it is possible to configure the writing of
+## images with @var{param}, @var{val} pairs.  The following options are
+## supported:
 ##
 ## @table @samp
 ## @item Alpha
 ## Alpha (transparency) channel for the image.  This must be a matrix with
 ## same class, and number of rows and columns of @var{img}.  In case of a
 ## multipage image, the size of the 4th dimension must also match and the third
-## dimension must be a singleton.  By default, image will be completely
-## opaque.
+## dimension must be a singleton.  By default, image will be completely opaque.
 ##
 ## @item DelayTime
 ## For formats that accept animations (such as GIF), controls for how long a
@@ -55,8 +54,8 @@
 ## be between 0 and 655.35, and defaults to 0.5.
 ##
 ## @item DisposalMethod
-## For formats that accept animations (such as GIF), controls what happens
-## to a frame before drawing the next one.  Its value can be one of the
+## For formats that accept animations (such as GIF), controls what happens to
+## a frame before drawing the next one.  Its value can be one of the
 ## following strings: "doNotSpecify" (default); "leaveInPlace"; "restoreBG";
 ## and "restorePrevious", or a cell array of those string with length equal
 ## to the number of frames in @var{img}.
@@ -70,21 +69,21 @@
 ## is only a single image at the end of writing the file.
 ##
 ## @item Quality
-## Set the quality of the compression.  The value should be an
-## integer between 0 and 100, with larger values indicating higher visual
-## quality and lower compression.  Defaults to 75.
+## Set the quality of the compression.  The value should be an integer
+## between 0 and 100, with larger values indicating higher visual quality and
+## lower compression.  Defaults to 75.
 ##
 ## @item WriteMode
-## Some file formats, such as TIFF and GIF, are able to store multiple
-## images in a single file.  This option specifies if @var{img} should be
-## appended to the file (if it exists) or if a new file should be created
-## for it (possibly overwriting an existing file).  The value should be
-## the string @qcode{"Overwrite"} (default), or @qcode{"Append"}.
+## Some file formats, such as TIFF and GIF, are able to store multiple images
+## in a single file.  This option specifies if @var{img} should be appended
+## to the file (if it exists) or if a new file should be created for it
+## (possibly overwriting an existing file).  The value should be the string
+## @qcode{"Overwrite"} (default), or @qcode{"Append"}.
 ##
 ## Despite this option, the most efficient method of writing a multipage
-## image is to pass a 4 dimensional @var{img} to @code{imwrite}, the
-## same matrix that could be expected when using @code{imread} with the
-## option @qcode{"Index"} set to @qcode{"all"}.
+## image is to pass a 4 dimensional @var{img} to @code{imwrite}, the same
+## matrix that could be expected when using @code{imread} with the option
+## @qcode{"Index"} set to @qcode{"all"}.
 ##
 ## @end table
 ##