refs #3227 added first versions of some integration tests. there are still many things to be improved. in order to make them running correct the HTTP_HOST config needs to be changed in phpunit.xml. some of the tests aren't running because of encoding problems. I'll maybe have a look at that later

git-svn-id: http://dev.piwik.org/svn/trunk@6560 59fd770c-687e-43c8-a1e3-f5a4ff64c105