Remove run_multiple
Remove legacy argument support in Gofer::Host.new
Update RDOC, still need to finish documenting Gofer::Cluster
Re-organise integration test, split helper functions into own file
Improve rdoc for Gofer::Cluster
Add more Gofer::Cluster integration tests
Bump version, update README & CHANGELOG
Update README, bring in CodeClimate
Opt to deprecate positional arguments in Gofer::Host.new rather than remove them outright for 0.5