JQuery
Some of my code had JQuery in it, this code produced a lot of compile errors. Apparently this is common, using other libraries does this a lot. I found a file out there called jquery.d.ts - apparently this is a definition file that the compiler uses to confirm the query syntax. I downloaded this file and put it into my Scripts folder. Then I placed a command similar to the following on the top of the .ts file
/// <reference path ="./Scripts/jquery.d.ts"/>