Empty Web API Controller for LightSwitch Projects

This pull request has two changes, first is removing Sayeds sample (his video is great, but it doesn't need to be in the repro). 

The second, and major, is adding a new item template which creates an empty Web API controller (plus the associated Global.asax file). This is put under LightSwitch, so that people using a LightSwitch HTML project can easily add a Web API Controller.