Very incomplete implementation. Capable of reading the file table and
not much else.
Also add the "alice-ar" utility for testing. Eventually this tool should
support modifying ald and afa archives. For now only supports dumping
the afa file table.
- Create separate directories for source and header files.
- Build code shared between xsystem4 and aindump as a static library.
- Create header dirs gfx/ system4/ and vm/
- Make CG.c/h usable without a running VM