Turning on the garbage collector again. See if this breaks travis.
Merge branch '1.7' into 1.8
Fixed security problem for windows machines.
Merge branch '1.6' into 1.7
Updated changelog
Merge branch '1.7' into 1.8

Conflicts:
	ChangeLog
	lib/Sabre/DAV/Browser/Plugin.php
Set release date
Merge branch '1.6' into 1.7

Conflicts:
	ChangeLog
Merge branch '1.7' into 1.8

Conflicts:
	ChangeLog