Merge pull request #91 from jensweigele/setExitBehaviourViaCmdLine

Set exit behavior via startparameter
Added ForceDirectories call to ensure the directory of the NUnit XML output file exists
Merge pull request #92 from jpluimers/master

Added ForceDirectories call to ensure the NUnit XML directory exists
Categories node was not correctly parented for test cases.
Gave message param a default value on Assert.AreEqual.
Merge branch 'master' into LUCEBITversion