Replaced builtin macro packages with .mac files that are included like ordinary .inc files.

The benefits are:
- Independency of ca65 build from perl
- More transparent behaviour
No copyright message here.
Allow for warning-free build of ca65 with MS VC on warning level 3.
Allow for warning-free build of common with MS VC on warning level 3.
No SVN version here.
Allow for warning-free build of cc65 with MS VC on warning level 3.
Allow for warning-free build of ar65 with MS VC on warning level 3.
No copyright message here.