Add SYSV init script to the deb package

This is useful for debian wheezy which does not have upstart support.
The approach taken was similar to that used by the marathon package in
the following: mesosphere/marathon-pkg@877daf16a6e7719d78bce68c9459a1094f23f99c
Merge pull request #1 from mesosphere/sysv-init

Add SYSV init script to the deb package