Support typescript with TSC compiler

[boltex]

If the detected language of a script initiated by Ctrl+B is 'typescipt', consider the code to be a typescript source instead of javascript and run it through TSC compiler before giving it to the regular leojs script runner.

see https://stackoverflow.com/questions/23075748/how-to-compile-typescript-code-in-the-browser
see microsoft/TypeScript#50758

[boltex]

See this for a working example
https://jsfiddle.net/mp4ev9t5/1/