modifiers for all keys for testing purposes and forgotton to fix
that. Now choosing required modifiers per key. This fixes
shift+arrow keys suppressing the shift key and, i think, the
option key not working.
multiple systems with automake, with X Windows and Carbon window
system APIs supported. It's also a starting port for supporting
win32 builds using mingw. OS X support is incomplete; the tree
will compile and link but the binaries will not function.