fix post-proc script failing on initial run because ubuntu-net doesn't exist
say yes to devscripts and equivs
add support for specifying releases and arches to upload to glance
Merge pull request #130 from mikemccracken/ex-add-image-config

add support for specifying releases and arches to upload to glance
Merge branch 'experimental' of github.com:Ubuntu-Solutions-Engineering/cloud-installer into experimental