Removed calendar-blue.css.
Moved calendar js to calendar_with_talks.js.erb and enabled calendar also in talk#edit.
Use buttons in list view. Also removed html_safe using link_to and content_tag in icon_button helper.
Fixed default subject body generator to support list tickles.
calendar_with_talks now accepts a key-value list.
Use set_cal_path helper to generate path to calendar_with_talks.js.erb.
Call set_cal_path only for the standard list view.