Still getOutputHandler has to go from the Poc.

Only this one we have to go to enviromnent independent cache engine.
Merge branch '2013-01-26#Capture#' of github.com:php-output-cache/poc into 2013-01-26#Capture#

Conflicts:
	src/Poc/Poc.php
	src/Poc/Toolsets/NativeOutputHandlers/HttpCapture.php
All tests are working, with the new pluginsystem.