merging PR #166: Document the rulers of chaosbot

#166: Document the rulers of chaosbot

Description:
Due to the merge window and my approval of #153, I can't approve this myself, so make sure to vote!

:ok_woman: PR passed with a vote of 33 for and 0 against, with a
weighted total of 1.0 and a threshold of 1.0.

Vote record:
@1m0r74l17y: 1
@ECrownofFire: 1
@elliottjro: 1
@Firedrake969: 1
@L3nn0x: 1
@PlasmaPower: 1
@SylvainThrd: 1
@Tyderion: 1
@Vorlent: 1
@andrewda: 1
@bperson: 1
@camd67: 1
@czyzby: 1
@davidak: 1
@droogmic: 1
@eukaryote31: 1
@fouxarn: 1
@GuoArthur: 1
@healiha: 1
@hemangandhi: 1
@hongaar: 1
@jakkra: 1
@jesshillier: 1
@nagyben: 1
@pchauncey: 1
@reddraggone9: 1
@rhengles: 1
@richardjonathonharris: 1
@scottsb: 1
@shnist: 1
@viktorsec: 1
@xyproto: 1
@ybart: 1

README.md

@@ -61,6 +61,15 @@ Emoji which count as votes are:
 Chaosbot has died 6 times.  This counter is incremented whenever the trunk breaks
 and the server must be restarted manually.  Last broken by #97
 
+## Rulers
+
+Chaosbot has been ruled by:
+- Democracy
+- Anarchy with [#48](https://github.com/chaosbot/chaos/pull/48)
+- Democracy, as the anarchy commit crashed the server and was reverted
+- @PlasmaPower with [#138](https://github.com/chaosbot/chaos/pull/138)
+- Democracy, as PlasmaPower relinquished his control with [#153](https://github.com/chaosbot/chaos/pull/153)
+
 ## Server details
 
 * **ChaosBot runs with Python 3.6.1 on Ubuntu 14.04 Trusty**