Modify the root of the main OME CI server to use ci.openmicroscopy.org
Deleting contributing docs on 4.4
Merge pull request #609 from sbesson/new_ci_root

Modify the root of the main OME CI server to use ci.openmicroscopy.org
Merge pull request #610 from hflynn/contrib_4_4

Deleting contributing docs on 4.4