add links to install shared py package into python2.6 and python2.7
only show 'Active Mesh' header if there is an active mesh connection
create permanent Gtk.Menu in CommotionMeshApplet(), so we can add/remove items

Create a blank Gtk.Menu as part of CommotionMeshApplet.__init__ so that it
can be used and assigned where it needs to be.  Then we can dynamically add
and remove items depending on the JsonInfo scrape.
update the menu in response to change signals from NetworkManager
make Mesh Status window update every 5 seconds with fresh JsonInfo poll
make sure to blank cell in HNA/Internet columns when no HNA route exists
implement CommotionMeshApplet.choose_profile() to connect to mesh
bump version to v0.0.20130301
changed Debian package Section: from gnome to net