Stop piggybacking hidtest by adding a "libhpcalcs" library and creating a test program. Expand functionality, e.g. hpfiles, vpkt fragmentation and reassembly. Add maintainer build scripts.

Signed-off-by: Lionel Debroux <lionel_debroux@yahoo.fr>
Expand functionality further.

Signed-off-by: Lionel Debroux <lionel_debroux@yahoo.fr>
Tested-by: Xavier "critor" Andréani <andreanx@hotmail.com>