make depend

add line elements in octree + little nicer Probe drawing

upgrade triangle to version 1.6

add fixme for extract volume in 2D (orientation of quads)

moving all external code to contrib subdirectory

Please don't load solver plugins by default: for the vast majority of users,
the structural solver options don't make any sense.

Just add Solver.Plugins=1 in your option file if you need that stuff.

New plugin to compute the modulus and the phase of a complex-valued field
in-place, in one simple step. One could already do this with Plugin(Evaluate),
but it was a little bit cumbersome.

fixed crash when using Plugin(CutParametric) in a script ("v->" -> "v1->")

fixed crash when using Plugin(Evaluate) in a script ("v->" -> "v1->")

removed unused stuff + handle SURF_DISCRETE in MeshDiscreteSurface

polih previous commit

decompose hexa so that the edges match on each pair of opposite faces

make center/right-align work for scales and 2d-plots, too

change min/max/step depending on 3d status

- the grid options now also apply to 3D views (this way we can
  finally get accurate size info for any data set; and the info
  is updated in real-time for gemeotry transformations & displacement
  maps)

- new option to specify the size of the moving axes

- generalized text align code (we now support the 9 modes that TeX
  does)

change sign of levelset so that the iso-volume is more natural

added interactive callbacks in CutParametric and Annotate

add element size computation

Plugin(Extract) can now also extract data from a specific time step

Generalized Plugin(Extract) so that it can also create tensor views

small generalization: we can now interpolate data from abritrary
views (and not only from views having the same data type as the
destination)

I use this to interpolate (combination of) components of a field
in one mesh onto another mesh, for example a set of isosurfaces
from another field. Wicked cool! ;-)

small doc fixes

- generalized the octree code to make it work with all the element
types, and not only with triangles/tets (and fixed a couple of copy &
paste bugs in the process...)

- modified all depending plugins to take advantage of this