adding a quick testing guide:

since the configuration section makes assumptions about how the cpan shell is configured, it is incomplete; this quick testing guide tries to provide the mising bits for the beginner
add a footer for the sponsor and activate it depending on the hostname:

this should probably be covered in the cpantestersmatrix.yml file; maybe the whole text in a variable?
set background for the img, it is transparent
Merge pull request #6 from andk/master

Add a footer linking to the sponsor