Print debug messages and slow down execution when we build in debug mode
Fix the random value generation

* sizeof(uint8_t) does not give the max value of a uint8_t, don't know
what I was thinking.
Reset the 0xF register before drawing
Rename pixel to column as it is more accurate
When dumping the pixels, print a space when THERE IS a pixel here
Create the roms directory if necessary
Initialize the pseudo random number generator