Pysyncobj

- Added persistent journal. Now all transactions are saved to file without waiting log compaction
- Added replicated_sync decorator. It will wait until function applied on the majority of all servers and returns result.

- Dynamic cluster membership changes

- Fixed CPU usage (was broken in 0.1.10)

- Fixed major bug in protocol implementation (could lead to unconsistency; detected with random test)
- Fixed memory leak (Node and TcpConnection was not destroyed by garbage collector, because of **del** operation)
- Added onReady callback - it is called every time after process starts, as soon as SyncObj synced with other nodes (received latest version of all data)

- Few minor procol bug-fixes (detected with random test).
- Benchmarks.

- Added encryption
- Refactored networking code