This is a feature branch for release 2.2 including the parser POC changes (see ID#143).
ID#143: Sync check-in for parser POC. Performance quite good now.
ID#143: added cache functionality for retrieving tag lib classes to gain performance.
ID#143: added fix for "<foo:bar/>" tags resolving the tag name correctly ("bar" instead of "bar/").
Merge branch 'feature-2.2-parser-poc'

Conflicts:
	core/pagecontroller/pagecontroller.php
Merge branch 'feature-2.2-parser-poc'

Conflicts:
	core/pagecontroller/pagecontroller.php