add missing line width spec

fix small bug in center-align for TeX output

- better test for drawing geo+mesh bbox
- ask if we want to uncompress gz files during merge

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

init val of NbTimeStep should be 1, not 0

- fixed double free in case there is an error in tSprintf

- new StrRelative command

- small demo on how one can add a generic title to a plot using
  Plugin(Annotate)

added a 5th axes mode: "Ruler" to help measure distances between any two
points

compute num of steps more intelligently

make the "General" view option panel less Gaudi :-)

polish the last commit some more (activate/deactivate widgets, etc.)

a little more work on the axes stuff: enable global axes for the geometry and
the mesh, too. We can finally get rid of the ugly old "moving axes" bit.

(+ reverted changes in unproject: need to be more careful since unproject
can be called outside Draw())

Make the X, Y and Z buttons behave like a sane person would expect them to
(with the axis pointing outwards, and not inwards!)

don't need the extra options anymore

- added an option to force the size/position of the 3D grids/axes

- cleaned-up the whole size/position thing of 2D/3D grids: it's much
  more consistent now (and the GUI is nicer)

- rewrote the algorithm for automatic positionning of 2D graphs (now
  they rescale with the window, which is much nicer--and far more
  practical)

change min/max/step depending on 3d status

- cleaned up (somewhat) + finished the euler angles/quaternion handling

- added a new little dialog in gui to specify the rotations/scales/translations by
  hand. This is similar to what I did in the Motif version of Gmsh a looooong time
  ago, and I was really missing this capability... (e.g. being able to specify
  exact rotation angles)

- 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)

added rescan() in show() (necessary since fltk 1.1.7)

enhanced clipping planes (thick lines + easy "invert orientation")

added arrows to show the orientation of the cut plane

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

added interactive callbacks in CutParametric and Annotate

removed all unnecessary glPushMatrix/glPopMatrix calls

typo

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