Update Allen Moore documentation
Updates the documentation on how to call Allen from Moore. Calling from Brunel is no longer described as this is deprecated. Compilation for sequences other than the default one in the lb-stack setup is described.
Based on !424 (closed)
FYI @rjhunter this MR is based on your branch to update the general instructions for calling Allen from Moore. If you agree, we can probably close your MR and merge this one instead.