Change Log. Expand status to human readable string

Opened on bugs scrub, based on https://github.com/Comcast/traffic_control/issues/620

smalenfant:
Sometimes I've got a hard time following what Ops is doing. Having a better understanding from the Change log would help a long way... I can't tell what happened here without knowing that "6" is OFFLINE. We should be expand this easily.

Would also be nice to see the "From Status" to "To Status".

2015-09-15 12:27:04 UICHANGE Update server edge04 status->6 user
2015-09-15 12:26:52 UICHANGE Update server edge03 status->6 user
2015-09-15 12:26:41 UICHANGE Update server edge02 status->6 user
2015-09-15 12:26:28 UICHANGE Update server edge01 status->6 user

Sometime we see the following.. probably different code path.

2015-09-18 13:20:23 UICHANGE Update server edge04.kabletown.net new status = REPORTED user
2015-09-18 13:20:18 UICHANGE Update server edge02.kabletown.nett new status = REPORTED user

dewrich:
If you can make a list of all of the Change Log tweaks you'd like to see like this, I will put it in the backlog to enhance them.