polls for folsom memory metrics
folsom statistics api is working
refactor common code into decodeReq
generic metric parsing functionality

This incorrectly treats all metics as Gauges. Work will need to be done
in folsom to output the metric type.
greater detection of actual dynamic metric
move dynamic Measurement creation into a func
ran go fmt
code cleanup

- no need for pointer
- move if statement into switch
update the docs
version bump
Merge branch 'master' into erlang-folsom-poller

Conflicts:
	config.go
updates to CHANGELOG
Merge pull request #37 from heroku/erlang-folsom-poller

Erlang folsom poller