Use capybara/poltergeist instead of webrat.

- switch to Ruby 1.9.3
- Don't log last response, instead put it on its own field
Port generator to Rails 3
Run arbitrary javascript step
Remove "Compare Screenshot" step as it serves no real value
Fix translations
Fix tests
Remove unused dependecies
Remove unused dependency
Use ajax polling when manually running health check
Update i18n_tools
Ignore Javascript errors
Version bump
Readme update
Note differences in behavior
Add vagrant setup
Use dynamic_form gem instead of plugin to remove deprecation warning
Replace table migrator plugin by large hadron migrator gem
Merge branch 'master' into capybara

Conflicts:
	Gemfile.lock
	app/steps/check_content_step.rb
	app/steps/check_current_url_step.rb
	config/locales/rails_de.yml
	db/migrate/20110503201404_rm_first_temp_table.rb
	db/schema.rb
	test/unit/check_content_step_test.rb
Fix tests
Highlight step parameter