clib2 Code

- Added some documentation on the skeleton library code.

- Added a complete shared library skeleton example to demonstrate how the
clib2 shared library initialization/cleanup functions should be used.
This is a dual-build library which will both work with the plain 68k
AmigaOS and the PowerPC native AmigaOS4. The example source code can be
found in the "skeleton_library" subdirectory.

- Fixed an important error in the documentation...

- Added the clib2 shared library initialization/cleanup code.

- Modified to build with the thread-safe library on OS4.

- Updated to use the proper OS4 build environment.

This commit was manufactured by cvs2svn to create tag 'LIB_V1_2'.

- Updated for dual PowerPC/68k build.

This commit was manufactured by cvs2svn to create tag 'LIB_V1_1'.

- Added shared library skeleton code (68k-only for now).