Buggy version comparison

We're testing things like @[ "duplicity_major" -ge 0 -a "duplicity_minor" -ge 6 -a "$duplicity_sub" -ge 20 ]@, which will fail e.g. for 0.7.1.

(from redmine: created on 2014-02-22)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information