Update to typeahead.js v0.10.3

From the official Changelog:

### 0.10.3 July 10, 2014

**Bug fixes**

* `Bloodhound#clearPrefecthCache` now works with cache keys that contain regex 
  characters. [twitter/typeahead.js#771]
* Prevent outdated network requests from being sent. [twitter/typeahead.js#809]
* Add support to object tokenizers for multiple property tokenization. [twitter/typeahead.js#811]
* Fix broken `jQuery#typeahead('val')` method. [twitter/typeahead.js#815]
* Remove `disabled` attribute from the hint input control. [twitter/typeahead.js#839]
* Add `tt-highlight` class to highlighted text. [twitter/typeahead.js#833]
* Handle non-string types that are passed to `jQuery#typeahead('val', val)`. [twitter/typeahead.js#881]