Updated the nuke script to fix the credits image path.

The credits image uses underscores, but dashes were used, making the
nuke script fail in deleting all credit images.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Updated license header for ColorGFX.java.

The lines explicitly reference line numbers to identify blocks of code
and this had to be updated since the code moved around.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>