Merge pull request #107 from ppowalowski/master

Smoothening Admin Fonts by using Open Sans
Fixed object relation naming and other stuff.

Singulizer added.
Added 'headerTags' to PageResponse controller.
Added handling of virtual fields (back reference) for relations.
started with asset handling mechanism
Implemented new asset handling system.
Merge branch 'asset-handler'

Conflicts:
	PageResponse.php
Added assets compression ability and some tests for asset handling.
fixed path replacement in style assets