Gruntfile: Create css folder.
Gruntfile: Removed unused tasks.
Gruntfile: Added spriteGenerator task.
Gruntfile: Watch for image file changes.
Gruntfile: Fixed stylus task.
Gruntfile: Added concat target for stylus task.
Gruntfile: Run stylus task before coffee task.
Gruntfile: Better file selectors for watch targets.
Stylus: Added normalize and import stylus files.