add autocad files for knob
updated colors and analysis
TCS3414CS:
  - added function to read only white/red, for faster performance.
  - complete printColor to include all colors

skitsort:
  - represents skittle sorter hardware and offers high-level functions to top level application.
  - stores skittle sorter related state

skitsort_app:
  - top level application, not complete

testplatform:
  - see comments for instructions how to use
update gitignore