Update octave dependencies

The base "octave" package is no longer virtual in Trusty, and the
version-specific packages in Precise are gone in Trusty.  So move
octave to the distro-specific lists and depend accordingly, also
adding a new dependency on liboctave-dev for Trusty. (Trac: #1516)
Add new dependencies per alexp and release

- Add gerris-mpi, openmpi-bin, openmpi-checkpoint, triangle-bin,
  and libjpeg62
- Add mesa-vdpau-drivers for trusty only

(Trac: #1516)