fixes #548 (issue with commit messages with blank spaces)
Allow non-branch refs to be used in GeoTools store in read-only mode
Unit test for datastore with non-branch head
Merge remote-tracking branch 'origin/pr/558'
rm duplicate line
Correct name of copyright holder in LICENSE.txt
Merge remote-tracking branch 'origin/pr/573'
Revise API to reflect new datastore functionality
Merge branch 'geotools-arbitrary-commits'