Front end

[omzmarlon]

This pull request include:

• Basic Authentication of our web app (required some minor backend change).
• We can now use protobuf in typescript (see README.md, there's still some further work to make code generation more autonomous) (Our web app does not support any error handling yet. so there may have some unexpected behaviour)

[tomyang729]

辛苦了💦 我这两天花时间看一下

[omzmarlon]

@tomyang729 Updated code based on review. Renamed method in ProtobufUtil And I switched to use cookies for authentication. I didn't realize play has some nice support for cookie manipulation. Using cookies actually makes front-end and backend code cleaner. And also don't need an "TokenDTO" anymore (we can just store username in cookies)

Reference: https://www.playframework.com/documentation/2.5.x/ScalaResults http://alvinalexander.com/source-code/scala/how-getread-cookie-play-framework-2

[tomyang729]

👍 🏅