orbit: New package

An MVC web framework for Lua

[Thomas P: add patch to fix installation procedure, and use the
provided Makefile for installation. Remove build-time dependency on
wsapi since there's nothing to build in 'orbit'. Remove run-time
dependency on 'rings', since it's not clear why Orbit would depend on
that.]

Signed-off-by: Assaf Inbal <shmuelzon@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>