Wrapped gtk.main() in threading code. This should fix the startup segfaults

TODO

@@ -15,5 +15,4 @@ bugs:
 
 * Direct Messages have no names, only screen names (may not be fixable without
   considerable tweets to python-twitter)
-* Segfault on start sometimes
 * Can't always kill tabs

mytwitter.py

@@ -447,4 +447,6 @@ parser.add_option('-c' ,'--config', dest="filename", default="~/.mytwitter.conf"
 my_twitter = MyTwitter(options.filename)
 
 gtk.gdk.threads_init()
+gtk.gdk.threads_enter()
 gtk.main()
+gtk.gdk.threads_leave()