Remove pgsql support.
redirect to show on not logged in
Fixed Avatar field

Changed to FileField rather then UploadField. The latter doesn't work
properly on the frontend.
Merge pull request #86 from halkyon/redirect_changes

Better handling of errors if not logged in. Redirect if no form.
Merge pull request #87 from halkyon/upload_field

Fixed Avatar field
BUG LatestPosts aren't being sorted correctly.

Currently shows oldest first. This now sorts them on the Created date
so the newest appears first in the list.
Move commits into 0.6 release
Merge pull request #89 from halkyon/sort_bug

BUG LatestPosts aren't being sorted correctly.
Merge branch 'master' of github.com:silverstripe/silverstripe-forum into 0.6
Merge pull request #93 from camfindlay/0.6

Cherry picked commits over to 0.6