Fix python setup and x86 support

[genebean]

Before this commit I had puppet using a virtualenv but that doesn't seem to be working like I thought it would. I switched it to installing pip packages to the system directly.

While testing this I also found that I needed to add a conditional for when I am testing using the x86 ISO from the Raspberry Pi website.

Fixes #18 and #19

[genebean]

This approach is flawed but it has lead me to a better one. I’ll try and post it tonight.

_{Sent with GitHawk}