ACL for Card classes can now be overridden.

This can be done by either the backend, or the container addressbook.
More docblocks
Fixed expand-properties report.
Merge branch '1.7' into 1.8

Conflicts:
	ChangeLog
	lib/Sabre/DAV/Version.php
	lib/Sabre/DAVACL/Plugin.php
	lib/Sabre/DAVACL/Version.php
Merge branch '1.8'

Conflicts:
	ChangeLog
	lib/Sabre/DAV/Version.php
	lib/Sabre/DAVACL/Version.php
Requiring PHP 5.4
Merge branch 'master' of github.com:evert/SabreDAV
Using short array syntax, just to see how it would be like ;)
Fixed range requests for non-seekable streams.
Merge branch '1.7' into 1.8
Merge branch '1.8'
Mac Office 2011 does not like the extra namespace declarations.

Issue #303.
Merge branch 'master' of github.com:evert/SabreDAV
Mac Office 2011 does not like the extra namespace declarations.

Issue #303.
Removed a few extra attributes added for old Windows versions.

MS Office 2011 had issues with this. Issue #303.
Merge branch '1.7' into 1.8

Conflicts:
	lib/Sabre/DAV/Property/GetLastModified.php
Updated changelog.
Merge branch '1.7' into 1.8
Merge branch '1.8'
Lets give PHP 5.5 a spin