Fixes #268

Fixes #268

Updated the getSiblings method to return the siblings and itself based
on the parameter passed. It will either pass itself with siblings or
just pass siblings. Added the test cases for getSiblings in the test
file.
Fixed bug with adaptModel lockedAttributes hash

- Also added fixed to trickle _isEnabled
Updated hotgraphic sample image

The example image used in the hotgraphic component isn't large enough in
the current framework. White space displays to the right of the image
area.

This is a scaled up version of the original image, however shows the
user the potential image area space available to them.
Merge pull request #302 from zenduo/develop

Updated hotgraphic sample image
Merge pull request #297 from adaptlearning/issue/#268

Fixes #268
Merge branch 'develop' into issue/#300

* develop:
  Updated hotgraphic sample image
  Fixes #268
  issue #214 fixed

Conflicts:
	src/core/js/models/adaptModel.js
Updated animation library to velocity.js

Fixes #303
Merge pull request #306 from adaptlearning/issue/#303

Issue/#303
Updated drawer to have a back button with custom views
Updated components.json for media component - added poster image too

fixes #308
Merge pull request #307 from adaptlearning/issue/#305

Issue/#305
Merge pull request #309 from adaptlearning/issue/#308

Issue/#308
Added lockedAttributes across all models

- Updated tests (more needs adding)
- Added backboneModel to handle bridge between all models and backbone
models
- Adds locked Attributes across all extended backbone models
- General clean up of AdaptModel.js
Updated tests to enable lockedAttributes
Fixed bug with adaptModel not having lockedAttributes
Merge pull request #310 from adaptlearning/issue/#283

Issue/#283
_canShowFeedback locked attribute added

Fixes #295 & #311
- Updated AdaptModel to include a lockedAttribute of _canShowFeedback
- QuestionView now uses this attribute to determining showing feedback
or not
Merge pull request #312 from adaptlearning/issue/#295

Issue/#295
Updated inview plugin

Fixes #270
Merge pull request #313 from adaptlearning/issue/#270

Issue/#270