Basic autocomplete for admin posts tags

Similar to the skins autocomplete: basic LIKE search, maximum MAX_RECENT items. Can be tweaked by further requests.
Rake task to destroy all unused admin post tags
Update .gitignore

added vim swp files
Merge branch 'master' of git://github.com/otwcode/otwarchive

updating my master branch
Issue 3284: Change subject line for account activation emails
Merge branch 'master' into deploy
Updating whitelist and resolving conflict
Merge branch 'master' into deploy
Merge branch 'master' into deploy
Merge branch 'master' into deploy
Merge branch 'master' into deploy
Merge branch 'master' into deploy
Merge branch 'master' into deploy
Merge branch 'master' into deploy
Fixing deploy script for db server
tag gl adjustment
tag gl css fix
standardized terms, measures
Update public/stylesheets/site/2.0/16-zone-system.css

spaces
Merge branch 'master' into deploy