Caching recent searches for autocomplete

Added new panel at autocomplete with recent searches, minlength for
autocomplete changed to 0, but will do request to database only if 2+
chars in string. also did little chaanges at jquery.tagsinput
Cosmetic changes at coffee script
Bugfixes
Improve AC-cache
Merge pull request #216 from Prillan/cache_autocomplete

Cache autocomplete