* include/cln/version.h.in, src/base/verion.cc: New files.
* configure.in: Generate include/cln/version.h.
* cln.m4: Rewrote it. Check result of cln-config without compiling.
Do cross-check library version and header version information.
I am too lazy for a detailed discussion of all the changes.
Many identifiers got their `cl_' stripped off. Ok, this is a
clumpsy CVS log-entry. Promise: more will soon go into the
file ChangeLog. I apologize for the inconvenience. :-(