Start mega-gold challenge. Add a new ColorPalette XIB.
Update project file with new ColorPalette XIB file.
Add color instance for Line class.
Better color palette.
Rename
Rename ColorPalette.xib => ColorPaletteView.xib
Initialize three Finger gesture recognizer.
Finally made ColorPalleteView.xib show up.
Implement showColorPalette to show the color palette.

- Shown when user swipes up with three fingers
Tweak animation to make the color palette appear from the bottom.
Fix broken IBActions.
Remove useless ColorPaletteView file.
Fix outlets and actions. Make DrawView the File's Owner.
Merge remote-tracking branch 'origin/chapter13-mega-gold-challenge'

* origin/chapter13-mega-gold-challenge:
  Fix outlets and actions. Make DrawView the File's Owner.
  Remove useless ColorPaletteView file.
  Fix broken IBActions.
  Tweak animation to make the color palette appear from the bottom.
  Implement showColorPalette to show the color palette.
  Finally made ColorPalleteView.xib show up.
  Initialize three Finger gesture recognizer.
  Rename ColorPalette.xib => ColorPaletteView.xib
  Rename
  Better color palette.
  Add color instance for Line class.
  Update project file with new ColorPalette XIB file.
  Start mega-gold challenge. Add a new ColorPalette XIB.