Added UsersController#ghost method and path to allow manual ghosting of different user account in Rails.env.development (closes #78).
Cleaned up ability.rb to properly inheret from guest access through to admin.
Improved header menu for various role access.
Replaced placeholder form text with labels for clarity in race#new and zone#new form.
Added main.js.coffee for site-wide javascript.
Added [data-toggle] jquery selector to initialize all bootstrap tooltips.
Fixed some functional (but misleading) controller calls to .update instead of .update_attributes.
Cleaned up admin/guild views for edit/new.