Task #252: Add button Register for event
Merge branch '253' into 252

Conflicts:
	sites/all/modules/custom/idevels/idevels.module
	sites/all/themes/idevels/styles/styles.css
Task #252: Now we calk number of users who register for event.
Merge branch '252' into test

Conflicts:
	sites/all/modules/custom/idevels/idevels.module
	sites/all/themes/idevels/styles/styles.css