Basic multiget setup.
Adding the prefetch to the sync plugin.
Added the prefetcher to both the Cal and CardDAV plugin.
Merge branch 'master' into multiget
Added methods to fetch properties for lists of nodes.
New multiget system integrated into the plugins.
Support for the IMultiGet interface in CalDAV.
MultiGet integration into CardDAV.
Optimizing multiget into the CalDAV PDO backend.
Added multiget support to CardDAV PDO backend.
Updated changelog
Removed hyperspeed.
Added some docblocks.
Merge pull request #323 from evert/multiget

Multiget
Fixed vcardurl field length.
Merge branch '1.6' into 1.7

Conflicts:
	ChangeLog
	examples/sql/pgsql.principals.sql
	lib/Sabre/DAV/Version.php
	lib/Sabre/DAVACL/Version.php
Merge branch '1.7' into 1.8

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

Conflicts:
	ChangeLog
	lib/Sabre/DAV/Version.php
	lib/Sabre/DAVACL/Version.php
Merge branch 'master' of github.com:evert/SabreDAV
Merge branch 'master' into xml-rewrite

Conflicts:
	lib/Sabre/CalDAV/Plugin.php
	lib/Sabre/CardDAV/Plugin.php