Make private methods actually private.
Use :c instead of :incr to be closer to the actual protocol.
Simplify packet generation implementation.

Warning: this means that calling gauge on statsite will now actually be a gauge instead of a key value. If you want to use a key_value, use StatsD.key_value instead.
Small cleanup.
Add timer and counter aliases.
Remove unnecessary return.
Cleanup of write_packet method.
Remove aliases.
Merge pull request #35 from Shopify/consolidate_implementations

Refactor