Albrecht Gebhardt <albrecht.gebhardt@uni-klu.ac.at> was the first one
to split vtblc into a program and a library.

To keep the library (only used by amanda, so far) in sync with the
ftape-tools package, I have merged some of his changes back (notably
better handling of verbose/quiet flags).

However, there are some differences in the naming scheme:

- I call the library libftvt.[a,so]. "make install" will install
  libvtblc.[so,a] as a symlink. "make uninstall" will remove those
  symlinks, too.
- All functions which are globally visible are prefixed by "ftvt_...".
- Some of the function have different calling conventions now, beside
  the "ftvt_..." prefix. In order to preserve compatibility with
  Albrecht's library I have written a wrapper header file which is
  installed as "vtblc.h". It defines some macros so that the new
  libftvt.[a,so] can be used without changing amanda's code.

TODO:
This is all untested. I still have to compile and use amanda with my
library version

