Added: travis-ci build status badge
Updated: contributions section [ci skip]
Added: test directory README.md
Updated: test suite read me
Removed: static declaration for get_metakey()
Added: base_model_cpt unit tests
Merge branch 'refs/heads/development/unit-tests'
Added: namespacing

Since phpUnit requires PHP 5.3, namespacing was added to testing classes.
Modified: unit tests
Added: coveralls support