Isolate/refactor browser <-> client communication code

[MatzElectronics]

There are currently two mechanisms across three files that handle the communication between the browser and the client/launcher.
Mechanisms:

• GET/POST
• Websocket

Across these files

• blocklyc.js
• blocklypropclient.js
• editor.js

The functions need to be isolated and separated into just the blocklypropclient.js file, and any functions not related to the broswer/client comms need to be moved to the editor.js or blocklyc.js files. This will allow them to be safely removed when the launcher is merged into the offline app.