1.6.9

FIX: debugger: fixed crash on launch when using encrypted Kickstart #199
FIX: screen: don't overwrite OCS colors with AGA colors from different banks
NEW: screen: support AGA colors, show BPLCON3 (TODO: get AGA colors from .profile file)
FIX: Builds using MacOS 11 for better compatibility; Includes updated binaries for GCC, binutils and FS-UAE PR#197