Merge pull request #15 from jgsmith/master

merged backbone branch with master branch
Merge pull request #16 from jgsmith/master

Updated to latest backbone.js and underscore.js
Merge pull request #17 from jgsmith/master

Add localstorage option to demo
extended TEIValidator to support server validation
adjusted instantiation of TEIValidator to reflect changes
example use of TEIValidator to validate via server
subclassed validator
subclassed validator
subclassed validator
subclassed validator; excluded example handlers from class
subclassed validator
Merge pull request #18 from raffazizzi/master

Introduced and optimized hook to server side validation
Merge pull request #2 from umd-mith/master

catch up with Raffaele's work