Review request for JDK-8074404: TypeScript is broken in 8u40

[Hannes Wallnoefer]

Please review JDK-8074404: TypeScript is broken in 8u40
http://cr.openjdk.java.net/~hannesw/8074404/

This adds the TypeScript compiler to our test suite, as well as some 
sample scripts that allow it to be used with -w/--watch options.

Hannes