• added Meson build system; meson and ninja are new build dependencies; @santouits
• code reorganization (in progress) @ericonr
• removed wrapper scripts;
• [nwggrid] fixed parsing localized Name and Comment fields in .desktop files;
• [nwggrid] catched exception on $LANG variable not found; #60
• [nwgdmenu] nwgdmenu_run command removed; <input> | nwgdmenu creates a menu out of stdin input;
• [nwgdmenu] -run argument added to force building menus from commands in $PATH in case the autodetection of the stdin content is false-positive (happens with GDM);
• [nwgdmenu] [grid] Delete key clears the search box; #56
• [nwgdmenu] Insert key switches case sensitivity; #56