Add possibility to edit the function related to the actual keyword in editor * octave-qscintilla.cc(get_actual_word): new internal function; (context_help_doc): uses new function get_actual_word; (contextMenuEvent): new context menu for editing function of actual keyword (context_edit): function for edit action in editor file menu; (contextmenu_edit): new slot for context menu; * octave-qscintilla.h: new functions context_edit, contextmenu_edit, get_actual_word * file-editor-tab.cc(context_edit): new slot for editor menu action * file-editor-tab.h: new slot context_edit * file-editor.cc(request_context_edit): new slot for file menu entry; (construct): new entry in file menu for editing function of actual keyword; (add_file_editor_tab): connect new signal fetab_context_edit to the new slot context_edit in file_editor_tab; (set_shortcuts): enable/disable new shortcut when editor focus changes (check_actions): enable/disable new action depending on existing tabs * file-editor.h: new signal fetab_context_edit, new slot request_context_edit, new edit function action

To cite GNU Octave in publications use:

  John W. Eaton, David Bateman, and Søren Hauberg (2009).  GNU Octave version
  3.0.1 manual: a high-level interactive language for numerical computations.
  CreateSpace Independent Publishing Platform.  ISBN 1441413006,
  URL http://www.gnu.org/software/octave/doc/interpreter/

A BibTeX entry for LaTeX users is:

  @book{,
    author    = {John W. Eaton and David Bateman and S\oren Hauberg},
    title     = {{GNU Octave} version 3.0.1 manual: a high-level interactive language for numerical computations},
    publisher = {CreateSpace Independent Publishing Platform},
    year      = {2009},
    note      = {{ISBN} 1441413006},
    url       = {http://www.gnu.org/software/octave/doc/interpreter},
  }

We have invested a lot of time and effort in creating GNU Octave, please cite it
when using it.  See also `citation pkgname' for citing Octave packages.