Allow parallel test execution in ncrunch.

This should now work correctly, and greatly speeds up the tests.

GitHubVS.v3.ncrunchsolution

@@ -7,7 +7,7 @@
     <AdditionalFilesToIncludeForSolution>
       <Value>lib\**.*</Value>
     </AdditionalFilesToIncludeForSolution>
-    <AllowParallelTestExecution>False</AllowParallelTestExecution>
+    <AllowParallelTestExecution>True</AllowParallelTestExecution>
     <ProjectConfigStoragePathRelativeToSolutionDir>.ncrunch</ProjectConfigStoragePathRelativeToSolutionDir>
     <SolutionConfigured>True</SolutionConfigured>
   </Settings>