Made CBM scrcode assembly-macro properly handle all 256 codes.
And, made it smaller.
Merge pull request #2 from greg-king5/scrcode

Improved CBM scrcode assembly-macroes.
In general "\%s" doesn't seem to be a valid printf format specifier. Given where it originally came from and how OneLine() is used elsewhere I'm pretty sure that it should rather read "%s".
If an Amiga specific spawnvp() is the only alternative it seems save to classify the UNIX specific spawnvp() as default.
Added projects for the remaining binaries to the MS VS 2010 solution.
Allow to supply searchpath defines as simple values instead of escaped C strings.
Replaced whole bunch for Makefiles with a single generic Makefile.

- Targeting GNU toolchain.
- Modern dependency handling.
- Warning-free build.
- GCC option -Werror set.
- Dynamic search paths.
- Don't write into source directories.
- Easy cleanup by just removing 'wrk'.
No copyright message here.
Removed obsolete Makefiles.
Replaced elaborate install logic with just a bunch of symlinks.

Maybe I'm naive but even after thinking about it for quite
some time I can't see why it should hurt to just build the
cc65 binaries from the sources "in place" and have 'make
install' simply create some symlinks in usr/local/bin.

The new Makfile builds the binaries with builtin search paths
matching their build location. So the symlinks in usr/local/bin
allow to allow to use them out-of-the-box without additional
environment variables.
No Windows installer here.
Removed unmaintained Makefile and file lists.