Add haproxy log rotation

Add prometheus monitor

Disable timer metrics -- prometheus can't scrape these.

Add muxy image

Add timers

Add backend/server queue gauges

Add retries counter

Add frontend/backend/server labels to active_connections gauges

Setup metrics names to be less http-specific

Rename mtail/syslog counter

Add active connections guage and bytes_read counters

Ignore vegeta's .bin file

Initial commit