Merge pull request #787 from Netflix/dev

Update v0.6 branch with latest fixes/improvements

Merge pull request #745 from smukil/fix_hdel_repair_script

Replicas shouldn't update top level rem-set on final field delete

Merge pull request #740 from smukil/in_flight_nonrepairable_crash_fix

Turning on repairs shouldn't invoke repairs for in-flight queries

Merge pull request #737 from Netflix/dev

Merge dev into v0.6

Merge pull request #735 from Netflix/dev

Merge dev into v0.6

Merge pull request #732 from Netflix/dev

Merge dev into v0.6

Merge pull request #730 from Netflix/dev

Merge dev into v0.6

Merge pull request #721 from smukil/fix_msg_leak_for_each_safe_quorum

Fix msg leak with DC_EACH_SAFE_QUORUM

Merge pull request #720 from Netflix/dev

[Beta] Add DC_EACH_SAFE_QUORUM consistency level

Merge pull request #717 from Netflix/dev

Merge dev into 0.6