Refactoring: Reader now expects the filename and the gCode content as parameters, instead of a FileReader
Feature: gCodeApp config class
Refactoring: GCODE.reader now uses GCODE.config
BugFix: Fixed boolean parsing and setOptions return value in config.js
Feature: Binding preferences form to config
BugFix: z-index of growls is now higher so that growls are displayed atop of modals
Feature: Loading gCode file from reader into view and displaying it with renderer2d
BugFix: clear canvas before drawing grid on reRender