Remove CYLON_TEST global var
Updates for Cylon core changes (removal of Connection/Device)
Use new multiple-device syntax
Ensure Firmata adaptor gets a port
Merge branch 'release'
Merge branch 'release'

Adds validation for cmd being an array in I2C requests.
Check required params are specified
Clean up, rename examples
Update I2C examples to use correct standardize callbacks.
Merge pull request #37 from hybridgroup/upd-i2c-examples

Update I2C examples to use correct standardize callbacks.
Update README
Update examples for new syntax
Bump version to "0.18.0"