Release 0.1.0

This update features:

• comparison of keys (#36 (closed))
• review of pending changes before commit/rollback (#35 (closed))
• editable foreign keys (#34 (closed))
• key sorting (#25 (closed))
• various smaller enhancements (#43 (closed), #41 (closed), #42 (closed), #40 (closed), #38 (closed), #31 (closed), #39 (closed), #37 (closed), #15 (closed), #27 (closed), #30 (closed), #29 (closed), #28 (closed))