Menu Added

A menu runs now. You can select an image. Working on the validation of
an image from a file. It seems to work, but is getting one character
wrong and the image file is larger than what the header says.
Validate Command Working

The validate command works checking a flash image vs a .bin file.
Cosmetic Changes

Updated some comments. Removed unused code.
Erase should work but not tested.
The write functions are #ifdef out.