fixing title
documented what the main container is
renaming height and width into viewportHeight and viewportWidth
some refactoring
moved creation of image data into initializeImageData
fixing jshint violations
extracted constant for canvas selector
renaming updateWidhtAndHeight to resizeCanvasToMakeItFitIntoViewport
using jquery to get canvas
refactoring debug module
extracted constant KEY_FOR_UNDEFINED_CHARACTER
some refactoring
using constant FileType.ALL
refactoring io module
argh - fixing jshint violation
refactoring urlutil -> url
refactoring help command
replaced tabs with two blanks
extracting constants
refactoring shell module, extracted constants