Merge pull request #100 from ova2/master

Completed Timeline i18n (localized text)
Fixed #103: Deleted nodes where not unselected.
Changelog updated
Implemented background areas for Graph
Fixed #106: timeline.render undefined.
Added docs and example on localization
Released Graph 1.2.6, Network 1.4.1, Timeline 2.4.2
Fixed a few typos
commited timeline-locales in gwt version
Fixed invalid dates in example16 on Firefox, Safari, IE due to date parsing problem.
Robustness improvements against invalid data
Simplified the example
Integration with jQuery Themeroller (theme aware Timeline)