Allow collectionType to fallback to generic Backbone.Collection.
Fixes tests / functionality broken by 8bfdf0338bc3a1422b72a7a701213d9fc300f3b5 / #294
Collection.update is now Collection.set

Collection.update is now Collection.set on Backbone 1.0.0
Update package.json

Collection.update is now Collection.set on Backbone 1.0.0 
Update index.html

Collection.update is now Collection.set on Backbone 1.0.0 
Collection#update -> Collection#set in tests
Backbone 1.0.0 in tests/lib
Fail earlier if failing
Merge pull request #303 from philfreo/backbone-1.0.0

Backbone 1.0.0 compatibility