bsim models package

Hi there.

i have created a somewhat flexible build system for the bsim-models
package [1]. it implements an autotools frontent to the current static
rules, mostly providing support to automatic configuration and
installation.

this is mostly meant to provide an example for the problem described in
#693267 [2]. a working debian package is contained in [1].

the proposed build system uses 'gnucap-conf' to collect location
dependent variables. this works with gnucap-uf and 0.36 together with
simple patches in the 'dev' branch on tool [3]. it also implements
compilation for local gnucap installations without messing with paths,
symlinks or makefiles.

manual configuration is supported, if gnucap-conf is not in $PATH. it's
also straightforward to add support for more adventurous setups.

as no makefiles are overwritten, it can be safely included in the
tarball, and (similarly) into the other plugin tarballs.

have fun
felix

PS: the README file mentions tests. what are those tests? it would be
nifty to have a check target...

[1] git://tool.em.cs.uni-frankfurt.de/git/gnucap-bsim
[2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=693267
[3] git://tool.em.cs.uni-frankfurt.de/git/gnucap