Add complete project documentation

Added

• Change Log
  • Added by William Entriken in regards to issue
    #90.
• Tracking README score
  • Added by William Entriken
• Full API documentation with headerdoc
  • Added by William Entriken
• Contributing guidelines and release process documentation
  • Added by William Entriken in regards to issue
    #93.

Fixed

• Crash of the iPad example when present from window is tapped
  • Added by Lily in regards to issue
    #84