Repo structure

There are 3 packages in this repo:

• Typings: where should reside the generated interop from NPM packages and other sources. It calls ts2dart in the process.
• Ts2Dart: a console app that receives a list of .d.ts files and transpiles them to Dart. It calls the ts_ast in the process.
• ts_ast: a nodejs app that analyzes a .d.ts and dump the analyzed info into a json file