Now xmenu detects if a menu has an icon, and if it doesn't have, the
menu will not have the gaps fgor icons, making the -i flag unecessary
to disable the padding. The -i option is still necessary, however,
to speed up xmenu loading, since it disables imlib2 initialization
routines.
• Adding support for gaps (#3)
• Adding more comments and categorizing function declarations.
• Adding support for EWMH properties (xmenu look is now consistent
in some window compositors).
• Changing how configuration is done (now all configuration belongs
to the config structure).
