_.bind instead of .bind() for <IE9 compatibility
New params for crossdomain jsonp support & cache
Store keyword earlier to avoid unnecessary traffic
New param to highlight keyword in result
Update backbone.autocomplete-min.js
Fix for 'highlight', escape user input for RexExp

RexExp caused an error if user entered e.g. backb\ or similar.
Update backbone.autocomplete-min.js
Merge pull request #15 from tkes/features-tkes

Bugfixes, new features for jsonp crossdomain, cache, keyword highlight