Many source files have the executable flag set

[xandark]

In apple2pi/src, all of the .c files are set to be executable, which makes it difficult to discern the newly minted executable files after they're made.

Or in apple2pi/share, a2pi.png is executable. All files in docs and pidrive are too.

[dschmenk]

This is a great annoyance to me and I can't figure out which OS I develop under keeps setting them. I'll fix them as I come across them. Thanks!