TypeScript compiler

[inikulin]

Make TypeScript first class citizen by automatically compiling .ts files like we do with ES6. This can be done (and more likely should) as standalone plugin.

[rafakwolf]

With typescript can be more easy to learn the framework, the type definitions are a documentation itself.
:D

[inikulin]

• Extract APIBasedTestFileCompilerBase base class
• Implement TypeScriptTestFileCompiler
• Callsites
• Implement TS definitions
• CLI *.ts file support
• TS definition descriptions