Added support for short arm designs
Added support for well list, genotyping primers only output, short arm
designs

This version will only support short arm designs until monds are made to
deal with both short and normal designs
Added chr_id to genotyping primers ONLY option
Updated to use the new calling interface for OligoSelection
$model is sent as a separate parameter, generally followed by a hashref
of further params.
Merge branch 'master' into david
Updated to deadl with well list for mouse single crispr primers