Redone debian packaging in a more standardised way

* package is now built using "dpkg-buildpackage"
* Makefile gets in the way of dpkg-buildpackage as it tries to execute make commands, so made it a fabfile.py instead
* debian/changelog is automatically generated from git tag (to keep versioning the same as what it was before)
* init script is done the "debian way" just naming it debian/lwp.init is enough (it gets installed/uninstalled by dh_installinit)
* postinst and prerem scripts no longer needed (handled by dh_installinit)
* copy built package into gh-pages directory as before

There is one TODO note, still need to handle the package signing