user-guide: change ghelp: to help:
mate-about: Update year in copyright
Bump version to 1.7.2
Bump version to 1.7.3
Sync translations with transifex
Fix mate_gdk_spawn_command_line_on_screen
Bump version to 1.7.4
help: Add figures to HELP_MEDIA
man: update EXTRA_DIST for new man page