Handle undefined redis_version

Apparently some servers don't send the redis_version with the INFO command (*cough* redis cloud *cough*). This causes the app to crash violently (yay node!).
Update changelog for 0.10.1
0.10.1
If there's an error in SELECT and there's no callback, emit the error.
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into disable_resubscribing