Adjust to become a standalone library.

* Cleaned up documentation
* Changed namespaces, cleaned up quite some code.
* Adjusted the tests to be more friendly to run on a dev machine and to work with php 5.3 too.
Merge remote-tracking branch 'origin/refactoring' into refactoring

Conflicts:
	.travis.yml
	phpunit.xml.dist
	tests/FOS/HttpCache/Tests/Functional/Fixtures/varnish/fos.vcl
enable apache for php 5.3