Added UpdateItemByXPath.cs

Signed-off-by: Dominic Cronin <dominic.cronin@gmail.com>
Merge branch 'master' of https://github.com/DominicCronin/T-cubed

Conflicts:
	TestingFramework/TestingFrameworkTemplates/TestingFrameworkTemplates.csproj

Signed-off-by: Dominic Cronin <dominic.cronin@gmail.com>