Configuration files to generate a Debian package

I've just created the required configuration files to generate a Debian package.

There is tons of possible improvements in the package. Those that I can highlight are:

 - There are no manpages for 'latch' and 'latch-shell' binaries, required by UNIX systems
 - Previously the compilation was creating a 'test' binary and that binary has a collission with the 'test' binary from coreutils in UNIX systems. I haver temporarly rename it to 'latch-test' but, looking at the sources I think that it could be removed.
 - I think that I could improve the configuration process by using pam-auth-update and generating the latch.conf file from a debconf wizard