Added support for Capybara and Launchy

 * Also updated Rails to 3.2.13
Added setting to remove StateMachine warning message.

* Note: This should be fixed properly!!!
Updated Meeting.prototype to take an on_date parameter, to set its date.
Added id attribute to the .time_slot Div.
Added spec/features directory for feature-level specs.

* Also added a custom features_helper file to contain the Capybara specific
  config settings.
Merge branch 'feature/visitor_viewing_meeting' into develop