Optionally omit stats_counts metrics

Adds the 'flush_counts' config. Defaults to true, so existing configs
aren't affected.
Allow for setting the process wtitle, or opting to let the os do it like previous versions
exclude the title test from running on Macs running node less than 10
note the fact that it won't work on node v0.8 on macs in the example config
Merge branch 'master' into optional_counts

Fixed merge conflict for new & legacy namespaces

Conflicts:
	backends/graphite.js
Merge pull request #148 from ktheory/optional_counts

Optionally omit stats_counts metrics
Merge pull request #311 from etsy/process_mgmt

Allow for setting the process title
Add link to the Stackdriver backend
Merge pull request #325 from katzj/patch-1

Add link to the Stackdriver backend
Correct obvious mistakes causing build to fail.
Merge pull request #327 from tgandrews/master

Golang client doesn't build
extract packet parsing into helper module
add more tests for metric types
Merge pull request #328 from etsy/refactor-packet-parsing

extract packet parsing into helper module
Update graphite.md

Logical fix
The sentence doesn't have a right meaning.
Merge pull request #329 from robert-zaremba/patch-1

Update graphite.md
makes it possible to configure which timer data gets calculated for
which metrics. Configuration is like the histogram one.
Merge branch 'configurable-timer-stats' of https://github.com/goir/statsd into configurable-timer-stats