Fixing issues for mapserver 6.4
Removing debug trace.
Always create new database in 'vagrant provision'.
Updating OpenLayers to version 2.13.1 and including attribution control. Adding proper attribution to used maps.
Adjusting attribution.
Adding overlay to admin. Cleanup in admin.py.
Adjusting version and cleanup in init.
Merge branch '0.3' into 0.4

Conflicts:
	eoxserver/__init__.py
	eoxserver/resources/coverages/admin.py
	eoxserver/services/mapserver.py