Add ''category'' field to the timeline RSS feed. This should eventually evolve to be the realm of the event's context, instead of the event.kind.
Add ''category'' field to the timeline RSS feed. This should eventually evolve to be the realm of the event's context, instead of the event.kind.

git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@4999 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,jun66j5/trac-ja,netjunki/trac-Pygit2,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,walty8/trac,walty8/trac,jun66j5/trac-ja,netjunki/trac-Pygit2,jun66j5/trac-ja