Version bump to 0.1.8

Version bump to 0.1.7 (#42)

Version bump to 0.1.6

Add functionality to allow addition of new value from yaml (#9)

* Add additional parameter to CfgNode to allow new values

* Format config files for test properly

* Allow addition of new CfgNodes from yaml file

* Format config properly

* Simplify logic for merging configurations

Version bump to 0.1.4 (#6)