working booking, cancellation, fixed diary to work properly, updated behavior when switching months to immediately load data a set firts day of newly visible month to be current day
updated behavior of datpicker when changing months. Next month selects first of next month, previous month selects last day of previous month.
Updated cancellation of lessons from user section to redirect back to user section
Merge branch 'richard'

Conflicts:
	nette-blog/www/js/main.js