Initial implementation of Consistency Panel. Several consistency checks remain to be implemented.
Implemented basic check for entity and quality. Closes issue #27.
Fixes #28, check for missing character state annotations.
Implemented check for different parent attributes for character qualities. Fixes #30.
Implemented check for post-compositions with multiple differentiae.
Changed refresh button icon. Set panel to refresh on load.
Merge pull request #51 from phenoscape/consistency-panel

Consistency panel