Merge pull request #245 from matelakat/key-error-fix

Add mapping for ocaml-vhd
Create and initialise repositories, so pbuilder could mount them
Import ppa key for ocaml repos
Inject key for Anil Madhavapeddy
Added Ocaml compiler repos
Break long line, so that humans can read it
Merge branch 'deb-build-fixes' into mate-fixing-xsc