Add Model#reload
Add dirty tracking for nested objects
Only copy over object properties, not simple values
Fix dirty tracking
Merge pull request #45 from darthdeus/add-model-reload

Add Model#reload
Add Model#revert() to reset changed attributes.
Merge pull request #64 from eventualbuddha/revert

Add Model#revert() to reset changed attributes.
Add hasMany relationships
Add RESTAdapter test around Ember.Array attrs
Fix embedded array params issue.

Closes #62 & #63.