1.17.1
configure.ac: Make it more like the gtkmm one.

* configure.ac:
  Use no-dist-gzip dist-xz tar-ustar with AM_INIT_AUTOMAKE.
  Use more compiler warnings and deprecation defines.
  Use MM_CONFIG_DOCTOOL_DIR to make tarball builds easier.
Script::add_search_paths(): Use std::string for filepaths.

* clutter/src/script.[hg|ccg]:
  Also avoid this g++ compiler warning:
  ISO C++ forbids variable length array 'searchPaths' [-Werror=vla]

  This shows the need for this patch in cogl to avoid a warning:
  https://bugzilla.gnome.org/show_bug.cgi?id=728022
Media, Script: Use std::string for filenames.