graphite: Add example echo handler

Need to add the protocol parsing the data from
http://ninenines.eu/docs/en/ranch/1.0/guide/parsers/
Write graphite records to etsdb
Actually use the command passed through
Let the vnode handle formatting for the keys

Will be more limiting of performance but will allow
the vnode to manage the format on disk
Write each metric to 3 vnodes
Be able to scan over the data and return the values
Hello world http
List all keys

Instead of just printing out all the data
Support running 2 apps on the same node

need to ping the other node then riak_core:join(NODE) currently
Respond with key names in json list
First pass at handoffs
Move port off default

This was causing timeouts that were rather annoying
Forward requests to the new node