Add build files for Ubuntu/Debian

This PR adds the file necessary for building packages for Ubuntu/Debian. Right now, they are just tested under Ubuntu 14.04 LTS ("Trusty Thar").

I have created a PPA ("Personal Package Archive") with packages for `connman` and `cmst` at https://launchpad.net/~mheiber/+archive/ubuntu/ppa for everybody to use. I'll try to keep it up to date as the development of both these packages progresses.

Disclaimer: This is the first actual package I publish for public consumption. I'm sure there are bugs in it, in fact, I'm fighting with a bug where `cmst` doesn't want to install because it's missing dependencies (which should be resolved by `dpkg` automatically). Help and suggestions are welcome!