Apparently debian splits pkg_resources out from setuptools. Still, we
need pkg_resources as a runtime dependency, not just a build dependency
as the pin factory entry points now rely upon it.
Also re-numbers energenie sockets 1-4 (as noted by @bennuttall in
comments to #239), and adds several "real pins" tests and board tests.
The bad-PWM stuff is currently disabled as it causes segfaults when
running the tests and I can't seem to trace the cause at the moment.
Finally, I've tweaked the deb config to suggest gpiozero, removed spidev
as a mandatory dep (which'll fix installs on wheezy for py3), and
there's some more miscellaneous last-minute stuff here that I can't
recall...
Changelog fixed so that I can sign the resulting packages. Remove doc
package from the Makefile, and explicitly specify section for packages
in control
