Python 2.4 support

[pipern]

In order to support Python 2.4, I did this:

diff --git a/ticketchangesets/admin.py b/ticketchangesets/admin.py
index f068b11..0ea8a14 100755
@@ -28,8 +28,8 @@ from trac.admin import IAdminCommandProvider
 from trac.core import *
 from trac.util.text import printout
 
-from .api import *
-from .commit_updater import *
+from ticketchangesets.api import *
+from ticketchangesets.commit_updater import *
 
 class TicketChangesetsAdmin(Component):
     """trac-admin command provider for ticketchangesets plugin."""
diff --git a/ticketchangesets/db/db1.py b/ticketchangesets/db/db1.py
index 957a4e8..dbaee29 100755
@@ -24,8 +24,8 @@
 
 from trac.db import *
 
-from ..api import *
-from ..commit_updater import *
+from ticketchangesets.api import *
+from ticketchangesets.commit_updater import *
 
 ##
 ## Database schema

[Mikael Relbe]

(In [8080]) Support Python 2.4, see #7202.

Thanks to "pipern" for the patch.