Add support for read repairs

• Read repair support with tests
• Multiple bug fixes including crash fixes

Add support for Redis scripting commands

• Adds support for EVALSHA, SCRIPT LOAD, SCRIPT EXISTS, SCRIPT KILL & SCRIPT FLUSH
• Changes default log level
• Removes incorrect assert in code

Support Redis module ReJson commands

• Support Redis module Rejson commands
• Support SCRIPT LOAD, EVALSHA, SCRIPT KILL, SCRIPT FLUSH, SCRIPT EXISTS commands in Dynomite
• Update Supported Redis Commands page with SCRIPT LOAD

Multi-mbuf payload decryption bug fixed

Merge pull request #619 from artpdr/update_Dockerfile

Update Dockerfile to install software-properties-common instead of python-software-properties.

Full debug mode crash fix

Fixes the crash introduced in full debug mode by the following commit:
192af49

MBUF updates

• Valid mbuf which contains an error string.
• Fix mbuf usage in dnode_peer_handshake_announcing
• Update .h dependencies and code base formatting

Consistency for SMEMBERS under DC_SAFE_QUORUM

Notable additions this release:

• Consistency for SMEMBERS under DC_SAFE_QUORUM
• Added support for Redis Geo commands (GEOADD, GEOHASH, GEOPOS, GEORADIUS, GEODIST, GEORADIUSBYMEMBER)
• Bug fixes for some crashes
• Minor code cleanup

v0.6.8: Merge pull request #564 from Netflix/dev

Merging dev to v0.6

Multikey Exists

• Mutikey Exists
• Info command with args
• More Robust Florida seeds parser
• New DNS Type
• Crash fix at Node replacement

Definitely Fix Crash during node replacement

There was a problem with schedule task not being cancelled leading to a crash in the scenario of node replacement