Roundrobin A/AAAA responses coming from rcache.

Also set the TC bit on m1, when there is a cache hit, and not m.
Create FAQ section
Version 2.0.0f
Add more about round-robin
Add some different build text
Log etcd machine updates.

Reports come in that this trigger skydns hogging the CPU, at least log
this so we can see something is going crazy.
Version 2.0.0g
Use exponential backoff when getting machines updates

When there is no etcd the machine update Watch fires continuously,
this causes SkyDNS to hog the CPU. Use simple exponential back off,
from 1 second to 32 seconds when trying to update.
And reset the timer when a connect works
version 2.0.0h
fucking travis
fmt
Add bit of random in backoff

When sleeping add up to 3 seconds of random jitter when reconnecting
to etcd.
merge
Fixed typo in README
Merge pull request #90 from dminkovsky/typo-readme

Fixed typo in README