Add support for monitoring multiple HAProxy servers
Added graceful handling for both statsd and python-statsd pip packages.
Merge pull request #528 from anthroprose/statsd-multi-pip-package

Added graceful handling for both statsd and python-statsd pip packages.
Merge pull request #527 from legion-github/multi-haproxy

Add support for monitoring multiple HAProxy servers
Fixes #516, this switches to a more robust way to detect if we are inside of a virtual env or not