Add Gush::Graph, extract graph logic out of CLI class
Extract overview methods out of CLI class
Merge pull request #11 from lonelyplanet/add-gush-graph-class

Add Gush::Graph, extract graph logic out of CLI class
Merge pull request #12 from lonelyplanet/extract-overview

Extract overview methods out of CLI class
put exceptions in gush namespace
extract handling exceptions out of CLI class
bump redis version
Merge pull request #13 from lonelyplanet/extract-exceptions

Extract exceptions handling from CLI class