make add_menu_separator() & add_menu_about() to generalize across GNOME versions

remove Quit from the menu too, it doesn't belong. Use "Remove From Panel"
remove unneeded 'transparency hack' that conflicts with GTK 3
only show menu on first button to avoid conflict with the built-in menu
split out JsonInfo and MeshStatus into a commotion.py file/package
run reindent.py to clean up formatting
put core functionality into CommotionMeshApplet class to ease porting
separate menu creation into menu_create() for use in GTK3 indicator
create PortingHacks class to handle differences between GTK2 and GTK3
include MeshStatus instance in CommotionMeshApplet for easy reuse
sort out GTK 2/3 About and Quit menu items
show BSSID and Channel of active mesh in the menu
add applet based on 'indicator' API
rename files to use commotionwireless.net as the root
move XFCE4-specific file to its own xfce4/ dir
GTK3 factory: fix Icon and Name
ignore the GTK3 factory for now, we're going to use the Indicator
create XDG autostart for indicator applet, this should work everywhere
add https://commotionwireless.net/ as Homepage: in Debian package
move all python classes into a single file/package
rename python package/file to commotion_mesh_support