Example Code Revision for Arduino

-renaming sketch file (it's slightly confusing with the firmware that is on the serial backpack controller)
-"ORANGE" actually is YELLOW when you mix red and green...
-made the functions more modular so customers can call the functions from anywhere in the sketch file
-added the set_matrix() function to set the position daisy chained matrix using the command char "0x25"
-added some code to navigate through each daisy chained matrix to make sure that the array is cleared before writing to the matrices
-added some lines to reset the frame index "0x26" using the command char before transferring so that Arduino can write to the LED matrix
Update README.md
Remove old code

Deleting old code with a revised Arduino sketch file that is more
stable. The new firmware required some command lines to reset the frame
index.
Update Example_RGBMatrix.ino

-Change character array to integer array for blank[]. This will cause problems in the future...
-Modified matrix_write() to make the transfer more general for daisy chained LED Matrices.
Merge pull request #1 from bboyho/Example

Example