Define a new shell module method named start() that tells the module when to
start loading data and running background tasks. Only really applies to the
mail module right now since the others use evolution-data-server. Basically
it prevents the mail module from loading and refreshing mail stores until
you actually switch to the mail view.
svn path=/branches/kill-bonobo/; revision=37309
EActivity objects instead of numeric handler IDs. Create an EActivity,
configure it, and (optionally) connect to its "cancelled" and "completed"
signals. Then hand it to the shell view via e_shell_view_add_activity().
When finished with the activity, call e_activity_finish() and unref it.
svn path=/branches/kill-bonobo/; revision=36391
