Ignore backup files
Allow diffierent DISTs with added parameterisation

"Native" packages should not have a revision - fix dependency generation
Add target specific mapping to enable compilation on Ubuntu and Debian in parallel
Bump ocaml-lwt to fix ocaml4 issue on debian jesse
Update blktap to fix ubuntu compile failures
Rebase SM changes on latest trunk
Update SM
Update xenopsd-xc path to support xen 4.3