src/sugar/activity/activity.py: If the activity is being invoked to
handle an invite, create a Client.Handler instance and share the
activity when HandleChannels is invoked.
src/sugar/activity/activityfactory.py,
src/sugar/activity/activityhandle.py,
src/sugar/activity/main.py: Add a -i switch that indicates to the
activity that it should handle the channel from an invitation.
src/sugar/presence/activity.py: Expose Activity.room_handle.
src/sugar/presence/presenceservice.py: Add get_activity_by_handle().
src/sugar/presence/util.py: Add get_account_for_connection().
* src/sugar/activity/activity.py: Get the shared activity wrapper from
sugar.presence.
* src/sugar/activity/activityfactory.py: Disable checking in the PS for
activity_id duplicates.
* src/sugar/presence/activity.py: Remove the PS dependency and query Telepathy
directly. Implemented enough to join an activity.
* src/sugar/presence/buddy.py: Remove the PS dependency and query Telepathy
directly. Implemented enough to join an activity. Added an Owner subclass of
Buddy()
* src/sugar/presence/presenceservice.py: Remove the PS dependency and query Telepathy
directly. Implemented enough to join an activity.
* src/sugar/presence/util.py: Add ConnectionManager for discovering and tracking
connections.