Bot-announce and new redis storage mechanism

[jm-welch]

Addresses #10, #13, #14

Resubmission of #15 pointing to dev branch

[jm-welch]

Tested this, and both changes are working.

Important

This will break any custom scripts that rely on either the _private.VO_INCIDENT_KEYS list or accessing incident alert data via a simple @robot.brain.get <incNum>.

To update scripts of the latter category, use this instead (replacing 1091 with the actual number in question, though it should be a string):

@robot.brain.get("VO_INCIDENTS")['1091']