Provide distribution as mu-plugin

[rmccue]

We've heard from quite a few vendors that they'd like a distribution as an mu-plugin, not just a regular plugin, so let's generate these as well.

[afragen]

We should ensure that however we accomplish this the fair-plugin is capable of being updated.

[Ipstenu]

@sc0ttkclark - Any suggestions?

[sc0ttkclark]

I came up with two options and have moved forward with a home grown version of option 2 below for the integration I needed it for.

#234

#235