[bug 761555] Several improvements in events timeline

* Add link to event in timeline headline
* Sanitize event names in API queries
* Fix multiple loading of timeline js libs
* TimelineJS Library cleanup:
  - Remove unused features for Google Docs, Twitter, Storify
  - Disable linkify_with_twitter feature for headlines
Merge pull request #350 from johngian/fix-timeline-titles

Several improvements in events timeline