add 1 more verbosity level; bump default to 3

print start time in batch mode

reorganized Msg() a little ("a la getdp" + colorize solver and direct messages)

issue a small warning if we try to include or merge an unexisting file
in the parser

removed glEnable(GL_ALPHA): this is not even in the GL doc :-)

set default number of smoothing passes to 1

enable light for wireframe arrows only in fill mode

generalized Plugin(Evaluate) to work on any (even non-scalar) views

fixed small bug in colortable_diff

generalized Plugin(Extract) so that we can also create vector views

better docs

doc update for extract plugin

quick generalization of Plugin(Extract): we can now extract arbitrary
combinations of the field's components

operator is a reverved C++ keyword: operato->operatorr

save view type only in FULLRC (not OPTIONRC)

fix exportLcField for lines and quads

test case for Coherence modifying the transfinite attributes

- store the points required by the transfinite algo in a list of vertices
  (instead of surf->ipar, vol->ipar)

- generalized Coherence for these lists of transfinite points

- removed context.default_plugin

- changed the main so that we load the plugins *before* we set the
  options (this way you can save your favourite plugin options in
  .gmsh-options, too)

force flex buffer flush after an error

fix make parser on linux

don't include matheval in commercial releases

prefix all the xmath functions with "x_" : some of these are defined
in the new C++ math lib with the same names

avoid error when trying to apply a plugin to a view that has been deleted

get rid of asprintf

matheval.c -> matheval.cpp

small tweaks

save the colormap if it's different, too

don't allocate too many value inputs for the plugin windows

missed those files in my previous commit

- only save the options that differ from the default values (unless we
  explicitly ask to save everything)

- tweak the auto doc routines

- added hacked version of the GNU matheval library to evaluate parsed
  functions efficiently ("a la getdp", but faster): I added a new
  directory (gmsh/MathEval) with that code, as well as a new configure
  option and a new define (HAVE_MATH_EVAL)

- generalized the plugin option code to accept arbitrary string options

- new plugin Plugin(Evaluate) that can evaluate arbitrary functions on
  scalar views (useful for example to create background meshes)

PS: Everything (octree + function evaluation) is now in place to write
a general plugin that can make any operation between arbitrary
views...

left some CVS dirs in the source archives

upgrade gl2ps to 1.2.0

use abort() instead of exit() when we really want to exit *now*