Creating SqrlUtil class to hold commonly used code.

Moved loadConfigFromJSON() into this class.

Renamed loadConfigFromJSON() to configure() in the non util class. This future proofs the library in case the config is changed to use YAML, etc.

Unit test for the new SqrlUtil class.
Modifying to move util class to abstract class for others to extend
Merge pull request #10 from sprak3000/master

Creating SqrlUtil class to hold commonly used code.