Changes behaviour of bulk collection subscription
* Changes the behaviour of collections to notify subscribers once only when adding an array/collection of items. Previously, subscribers were notified for each item in the array/collection.
* Adds new method to suppress subscriber notification when using collection methods.
* Fixes typo in test cases.
* Adds test case for new functionality.
Updates correct version in bower.json
Merge pull request #1 from Streamtime/0.2.x

Synching master with latests 0.2.x branch