Modified tests to use SRCMLBINDIR instead of TestConstants.SrcmlPath.
Fixed CS.EMPTY.CATCH in SrcMLFile.
Changed tabs to spaces.
Added a null check to Src2SrcMLPreviewWindow.MenuItemLanguage_Click. This was flagged by klocwork (CS.NRE.GEN.MUST).
Moved error display to a separate function (it was only used once before) and fixed an empty catch block (flagged by klocwork CS.EMPTY.CATCH).
Removed unused srcmlBox_TextChanged method.
Changed all tabs to spaces.
Added SrcMLElement class, containing utility methods for srcML elements.
Fixed bug found by Dave where SrcMLRunner.NamespaceArguments would be modified by clients.
Added link to NppTransformExample project to the README.md.
Merge branch 'master' of https://github.com/abb-iss/SrcML.NET

Conflicts:
	ABB.SrcML.Test/ABB.SrcML.Test.csproj
	ABB.SrcML/ABB.SrcML.csproj
	Tools/ABB.SrcML.Tools.Converter/Program.cs
Added a GetXElementForSourceFile() in SrcMLArchive.cs, as well as a few minor comments modification
Ignore the changes in Program.cs
Merge branch 'topic-incrementalupdate' of https://github.com/abb-iss/SrcML.NET into topic-incrementalupdate
Keep XElement in EventArgs
Fix bugs and initial code cleanup