Fixed all instances of warnings OpenJDK finds with -Xlint:unchecked.
Merging this will at least result in a dependency on JDK 1.5 or later
that I'm pretty sure of. But since the only JDKs that are really safe
to use these days are versions 1.8 and 9, that's probably okay.
No promises that this will make modern SWT work or anything, but it's
probably at least a beginnig toward that as well.
images unfortunately), printing capability (StyledText widget does not
appear to use a given printer so it remains the default printer); fixed
raw dump mode to display in hex.
in some format; Applesoft BASIC is color coded; images can be viewed;
hex dump is shown; simple text transformation is done for nearly all
formats; raw dump isn't implemented correctly yet. Printing is done for
anything that uses the StyleText widget.
