Link to the video demo added to README and some minor fixes done to cube_solver

Minor changes in the code.

Minor fixes to the drawings on the screen and updated README-file.

The final text after the cube is solved is reformed.

The program draws the detected face on the screen during detection

The program works completely (as it seems) and the comments are added.

Rotation arrows fixed. The whole program works.

Something wrong with the rotation arrows during detection but otherwise program works

Finding and detecting face works a lot faster now

Center piece verification fixed

Program is able to detect any face accurately

Program can detect any face of the scrambled cube quite accurately

Solver can detect the cube as an independent object separeted from the background and retangle it

Calibrator comleted and separated from solver.

Värien HSV-arvojen rajat määritetään manuaalisesti