Proxy PuppetDB Performance Dashboard

Update README for PuppetDB Performance Dashboard

use && and ||

Render puppetdb dash in foreman layout

Better error message when we can't proxy puppetdb dash
Release 0.1.0
Include config dir in gemspec and bump version
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md
	app/controllers/puppetdb_foreman/puppetdb_controller.rb