Refactored syntax, switched to Poltergeist for testing.

* Now Refinery::Inquiries::Setting is inheriting Refinery::Setting
Renamed check_setting to find_setting which returns it.
Updated Gemfile spec to match Rails 4
Use rails 4 strong parameters to be compatible with refinery edge (3.0)
Conflicts:
	app/controllers/refinery/inquiries/admin/settings_controller.rb
	app/controllers/refinery/inquiries/inquiries_controller.rb
Set version 3.0.0.dev and also update refinery dependencies to 3.0.0.dev.
load_tasks isn't working anymore.
Get rid of redundant gems in the Gemfile. Also added back capybara-email.
Rewrite settings update logic taking into account strong parameters.
Merge branch 'master' into refactor_2014

Conflicts:
	Gemfile
	app/models/refinery/inquiries/inquiry.rb
Merge branch 'master' into refactor_2014
Remove binding.pry.
Merge pull request #141 from refinery/refactor_2014

Refactor #2