Merge branch 'release/0.2.21' into develop
src/Kisma.php: Updated wakeup/sleep to be aware of uncompressed data. Check session existence more vigorously
Seed.php: Added add/remove subscriber for subscription events. Added call to auto-remove handlers that were auto-discovered.
All tests updated to test new code.
Bump 0.2.22
Merge branch 'release/0.2.22'