Added support for @canonical in pages_controller.

Fixes #1472
I somehow screwed up and deleted release date.
And then the header level.
We need * for list item.
add ru translation for wymeditor
Fixes issue #1651
Add all generated attributes to attr_accessible whitelist. #1578.

Conflicts:

	core/lib/generators/refinery/engine/templates/app/models/refinery/namespace/singular_name.rb
Merge pull request #1669 from resolve/cherry-pick-2-0

Cherry pick for #1613
I lied. #1613 wasn't added until 2.0.5.
Add note to chanhelog about #1651.
Updated getting started guide to add link to Using Refinery with an Existing Rails App Guide
Use content_for :body and content_for :side_body in extension generators.
Add note to changelog about new page part name usage.
Merge pull request #1671 from bobbus/patch-1

Updated getting started guide to add link to Using Refinery with an Existant Rails App
Add ability for extension/form generators to append to existing seeds.rb file instead of overwriting it. #1532.
Add specs for #1532.
Add note to changelog about #1532.
Allow to match js files with more than one extension like js.coffee or js.coffee.erb in refinery:override rake task.
Add note to changelog about #1685.
To be fair Philip was the one who suggested better fix.