2.3 

Major changes
	Map view was added 
	Cell mode for Timeline view was added 
	Tree mode for Timeline view was added 
	Tooltips for all views were added
	Abbility to create new events by double click or by drag-and-drop in Timeline mode
	Abbility to move events by drop-and-drag in Timeline mode
	Abbility to create new events by external drag and drop 


Minor changes
	Week-number format option was added 
	full_day configuration option added 
	event_duration and auto_end_date configuration options added 
	Multiselect section for details form 
	Checkbox, combo, radio - sections for details form 
	Preventing events collisions for recurring events
	extra parameters were added to timeline-related handlers
	api of mini-calendar extension extended 
	custom form implementation simplified

Fixes
	incorrect processing of specific iCal datasources
	incorrect event rendering for overlapping events