Uses the class name for paramKey

Instead of using the Label provided in the CypherLabel attribute, this
uses the class name (unless a specific paramKey is provided) as the
paramKey to ensure the Cypher generated is correct.
Removed NCrunch files

No need to commit to the solution
Tidied up the tests file

Removing extra spaces.
Merge pull request #3 from cskardon/master

Using the class name for paramKey instead of Label