first crack at solving the ordering issue, releases order correclty and sort order view handler is working. Now need to resolve the tag parsing to support old d.o and new d.o formats and test a real feature upgrade

use drush_backend_invoke to fork the make command rather than assume an executable is on the /usr/local/bin:/usr/bin:/bin:/usr/games

added distro nodes to the acceptable node types for the project argument in the all releases view tab

Don't allow key fields (in particular, version numbers) to get pushed through formatting as some will empty() them out of existence.

1. Refactor the drush backend so that packaging backend can be swapped out easily.
2. Add an SVN backend.