Added:
+NPEG.Mono.sln
~~NPEG.csproj
++NPEG.Tests.NUnit.csproj

NPEG.Test -> NPEG.Test.NUnit:
~~Copy & Modified tests to use NUnit:

MSTest GUID types are not supported in MonoDevelop/Xamarin since it is tied to the VS UnitTestFramework namespace that is not available in Mono
Merge pull request #1 from sushihangover/mono-nunit

NUnit support: Copy and Modified test to support NUnit