Bind graphite listener to configured interface only

The graphite tcp listener should bind to the configured interface only.
Therefore the host *and* ports operands needs to be passed to the bind call.
This fixes issue #68.
Merge pull request #75 from MichaelHierweck/master

Bind graphite listener to configured interface only
Merge pull request #64 from cybem/chan-batch-sizes

Make channel sizes and batch sizes adjustable