Simplify autocomplete for tags.
Change message autocomplete to use tag-it.
Remove old autocomplete code.
Allow autocomplete to limit number of tags.
Prevent adding more tags when limit is reached.
Add test for message autocomplete.
Remove jquery-ui-themes.
Add theme for tag-it autocompletion.
Merge pull request #256 from t-bullock/autocomplete-cleanup

Autocomplete cleanup
Merge pull request #257 from t-bullock/remove-jquery-ui-theme

Remove jquery ui theme