Moved cachet from maketools into ctest in tools.
Added correct modelling of the subtle dependence between libsac2c
and libsacprelude via fingerprints of the ast to the makefile
mechanism.
Moved all configure-related files to a new top-level subdirectory
setup. The configure script in root now is a simple shell script
that invokes the real configure in setup.
Moved all sac2crc-related files from include to setup.
The configure-generated sac2crc file now resides in the project root
directory and the compiler sources are adjusted accordingly to look
after sac2crc in the right places.
The various source files of sac2crc are tidied up and all machine
specific targets are removed.
The LICENSE file is updated and moved to the project root directory.
The html documentation of the ast is now automatically created and 
stored in the new subdirectory src/html.