Exclude plugins through config

[Sitebase]

When I tried to run the heimcontrol app on my computer it would not start because of a dependency in piswitch called "wiring-pi", which seems to only build on pi I think.

So using this new configuration option you can just disable plugins you don't need or disable the plugins that don't work on your platform. The advantage of this is that you can now also run Heimcontrol on other platforms like a regular *nix server.

How do you guys test your new code? Do you always test you code on the pi itself?