Add loggers to gruntfile
Started converting project to node module instead of using requirejs.

Scenarios and AIs are still unconverted.
Fixed tests.
Removed annoying console logs in preparation for proper logging via Winston.
Refactor last classes, also pass cli options to all instances
Fix param handling in classes
Merge branch 'node-module' of https://github.com/indrif/elevatorsim into node-module

Conflicts:
	Gruntfile.js
	test/elevator.js
	test/elevatorsystem.js
	test/traveler.js