avoid Cell arrays in usr_transfer classes * urlwrite.cc (Furlwrite, Furlread): Require property value pairs to be passed as a cell array of character strings. Extract as Array<std::string>. (base_url_transfer::base_url_transfer, curl_transfer::curl_transfer, curl_transfer::form_query_string, url_transfer::url_transfer): Accept Array<std::string> for parameters instead of Cell object.

EXTRA_DIST += \
  m4/module.mk \
  m4/ax_blas.m4 \
  m4/ax_blas_f77_func.m4 \
  m4/ax_compare_version.m4 \
  m4/ax_lapack.m4	\
  m4/ax_pthread.m4 \
  m4/gnulib-cache.m4 \
  m4/libtool.m4 \
  m4/ltoptions.m4 \
  m4/ltsugar.m4 \
  m4/ltversion.m4 \
  m4/lt~obsolete.m4 \
  m4/pkg.m4