Added Kaylee startenv command logic
Started adding the internal server.
Working on run command.
Started the 'build' local command.
Working on build command.
Working on coffee handler in build.
Tests
Added build kaylee logic. Refactored commands.

Commands now throw errors if options are wrong.
Working on build.
Modified build template
Finished working on basic environment commands.
Removed WORKER_SCRIPT kaylee config parameter.

WORKER_SCRIPT_URL is not any longer required to be passed from
the client to the server. It is now dynamically found inside
kaylee.js script (as worker.js).