* big commit, mainly cleanups: - renamed gtk frontend into "gnome", which is more accurate - create "src/modest-platform.h" and platform-specific src/maemo/modest-platform.c and src/gtk/platform.c - get rid of all the #if-#else-stuff in src/, use the modest-platform instead - implemented modest_platform_get_file_icon_name, to get the icon name for some file or mime-type - move the menubar_to_menu to modest_maemo_utils_menubar_to_menu pmo-trunk-r875
* rename gtk2 => gtk * remove some unneeded code * update build system pmo-trunk-r468
* remove, does not compile anymore after tinymail changes to use this, one should use the branches/demo200607 version, and the corresponding tinymail pmo-trunk-r462
* renamed gtk-glade => gtk pmo-trunk-r351