Issue#393 

Adds /* falls through */ in case statement, if `break` missing. 

Tests not included ( working on )
https://github.com/Microsoft/TypeScript/issues/393

I am trying to build in `jake local'  and 'jake tests' getting an error error TS6053: File 'Data.ts' not found.  but  'jake LKG' seems to be working
it could be something like this 
case SyntaxKind.... : return writer.write(....); and this shouldn't be fall through