Update libraries.txt

Added:
* AngularJS v1.2.0-rc.3
* AngularJS v1.2.0
* AngularJS v1.2.1
* AngularJS v1.2.2
* AngularJS v1.2.3
* WebFontLoader v1.5.0
Merge pull request #15 from Jeni4/master

Update libraries.txt