Updated to release version of grunt-ember-templates

Previously was pointing to my patched version, but the
associated PR has been merged and released
Don't commit generated code
Revert "Updated to release version of grunt-ember-templates"

This reverts commit 587c174172293bb72ea150127c318beda18a3830.

The PR was not applied correctly.
Current active link now handled by link helper
Update to latest Ember, which allows for some views to be removed
Better dependency for TodosController#noneLeft