Update README.md

I was a bit of a newbie and didn't know that ember-rails was using a much older version of ember than what was up on the guides. I figure sharing that will save someone a tiny bit of confusion.
Merge pull request #262 from csaunders/patch-1

Update README.md
Updating store template to work with ember-data beta 2
Merge pull request #265 from jimmay5469/store-template

Updating store template to work with ember-data beta 2
Switching to DS.ActiveModelAdapter so underscore to camel works by default.
Update README.md

Added clarity around including components and the asset pipeline.
Added options to ember:install beta or canary version of ember & ember-data
Merge pull request #271 from hajee/master

Added options to ember:install beta or canary version of ember & ember-data
replacing DS.ActiveModelAdapter with _ams
using DS.ActiveModelAdapter.extend()
The consensus for overriding the default adapter
Bump ember-source version.
Merge pull request #274 from ugisozols/bump_ember_source_version

Bump ember-source version.
Add appraisals for ember-source-1.1.0.
Ignore appraisal generated Gemfile.lock files.
Remove pre-release versions of Ember.
Merge pull request #275 from rjackson/add_ember_1-1-0

Add Ember 1.1.0 to Appraisal
Remove unused Ember Data warning image.
Merge pull request #276 from xtian/unused-image

Remove unused Ember Data warning image.
Add jquery-rails as a dependency. Fixes #263