Thread TypeScript semantic errors as warnings

Fixes http://teampulse.telerik.com/view#item/282195
@teobugslayer  I don't think this is a problem. On Linux and MacOS, the line ending is \n, on Windows - \r\n. As we are splitting on \n, on Windows each split line will have \r at the end, but this is not a problem as we are matching the line with regex for specific content. I vote to leave this piece of code as it is :)