upgrade ember
utilize the new Computed#readOnly
Remove unused variables and helper functions
Merge pull request #817 from tricknotes/remove-unused

Remove unused variables and helper functions
prefer public DI api on the application instance when possible.
bump ember test-version
Merge pull request #819 from stefanpenner/upgradeEmberAndReadOnly

Upgrade ember so Computed#readOnly is available
Extended existing "meta" solution to allow custom meta properties to be passed to the store