some edits for excelSolution

some edits for excelSolution
Merge remote-tracking branch 'origin/master'

Conflicts:

	ExcelSolution/ExcelSolution.UnitTests/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache

	ExcelSolution/ExcelSolution.UnitTests/obj/Debug/ExcelSolution.UnitTests.csproj.ResolveComReference.cache
	ExcelSolution/ExcelSolution.v12.suo

	ExcelSolution/ExcelSolution/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache

	ExcelSolution/ExcelSolution/obj/Debug/ExcelSolution.Code.csproj.ResolveComReference.cache