added gitignore file should make it easier to pull / push
Merge branch 'master' of https://github.com/EbbeVang/Sudoku2Semester

Conflicts:
	NewGui/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
	NewGui/obj/Debug/NewGui_MarkupCompile.i.cache
	Sudoku.v12.suo