Change the stats_d handler to use native statsd counters for counter metrics. Also add in a unit test to verify expected behavour
PEP8 and tox fixes
Add option to disable reporting of all cores other than total, as on
servers with large numbers of cores this can use a lot of disk space with
little interest in per core numbers.
Record the current maxconnections settings, so we've got it to compare
against in stats.
try to get device mount information, but continue and log if it fails

Conflicts:
	src/collectors/diskspace/diskspace.py
Fix #296, this should allow unix socket usage with the memcached collector