Update README for change to libcaprights
Fix up needed files for distribution
Add README.md for Casper
Add local copy of gtest-1.6.0 for Casper

Also distribute files needed for testing
Wrapper script should emit exit code of test program
First pass at Casper debian packaging
Remove unneeded includes of <stdio.h>
Update gtest-1.6.0/build-aux

Building the casper package updates this according to the host system,
so update for convenience.
Install /etc/ files for casperd
Add init script for casperd to Debian packaging
Split out test that uses msgio.h

The msgio.h header is internal to libnv, so separate out that test from
the tests that hit the public interface.
Add makefile for testing against installed version

This makefile assumes that a system casperd is running and that
libcapsicum and libnv are available on the local system
Ignore all debhelper files
Fix compiler warnings
Allow for non-libbsd arc4random
Make libcapsicum.so depend on libnv.so
Install into /usr/sbin not /usr/bin