Removes the whole AS admin backend. For issue #165
Update to Rails 3.2.11. for issue #167
monkey patch acl9 and fix a minor bug. for issue #166
Clean up session and form scripts. fix a minor bug too.

the bug is: in the dataset edit page, empty the title and submit, the resulting
page's title is becomes 'create dataset page'
make Rack::Test::UploadedFile behaves like ActionDispatch::Http::UploadedFile. For issue #167
Merge branch 'master' into upgrade

Conflicts:
	Gemfile
	Gemfile.lock
	app/models/datacolumn.rb
delete mercurial file and some other tweaks.
Fix 'uninitialized constant Fixtures' error caused by upgrading rails
Enable asset pipeline. for issue #167
cleanup, refactor and some fixes.
Again fixes and refactoring. For issue #166
Merge branch 'master' into upgrade