Reloading records test now passes

Also removed some remnants of lazy materialization
Save test is now passing
Moved reload_test into integration/records
Got record persistence tests passing
Minor whitespace and docs fixes
Get model tests passing + add transforms
Get adapter tests passing

Removed adapter configuration of mapping and transforms as this will
become a serializer responsibility
Debug test is passing
Fixture tests are passing
Cleanup and prep for rebuilding adapter callbacks
Don't assign DS to window unless window exists - Fixes #681
More store unit tests passing
Got record array test passing
Relationship changes operate on records
Merge pull request #1068 from dblock/ajax-headers

Specify additional headers for DS.RESTAdapter.
Added DS.DebugAdapter which extends Ember.DataAdapter
Merge pull request #1114 from teddyzeenny/extension

Added DS.DebugAdapter which extends Ember.DataAdapter
Merge pull request #1109 from rzurad/null-inverse-relationship

Allowing inverse relationships to be nullable.
Require application.Store to be defined - Fixes #1084
mixup asset file