Support for Preview's previewText && previewTextMode
Refactored Tween to its own file.
Added a comment
Fixed an enum
Fixed font size application.
updated travis build
Setup Karma/Jasmine for tests.

Fixed some test issues in PhantomJS.
Fixed a few cases where subtitles were using seconds
Attempt to get unit tests run in CI
Added missing node dependencies.
Fixed travis unit test command.
Added CI build status to readme.
Class.register automatically adds to the namespace.
fixes
fixed unit tests
Implemented preview text animation
Merge pull request #46 from dreisch/prevew_animate

Implemented preview text animation
global maxlinks
Merge pull request #47 from dreisch/global_maxlinks

global maxlinks
Moved from XML to JSON
Merge pull request #48 from dreisch/xml_json

Moved from XML to JSON