initial commit of the fluid simulator.

Ton reviewed and gave his blessing.
Zr, can you have a look ?

see :
http://projects.blender.org/tracker/?func=detail&atid=127&aid=3039&group_id=9

for initial comments.

N_T : the solver itself (elbeem) needs some works to get rid of
warnings

source/blender/src/SConscript

@@ -23,7 +23,7 @@ source_files = ['B.blend.c',
                 'cmovie.tga.c',
                 'cursors.c',
                 'drawaction.c',
-		'drawarmature.c',
+		        'drawarmature.c',
                 'drawdeps.c',
                 'drawimage.c',
                 'drawimasel.c',
@@ -71,6 +71,7 @@ source_files = ['B.blend.c',
                 'editview.c',
                 'eventdebug.c',
                 'filesel.c',
+                'fluidsim.c',
                 'ghostwinlay.c',
                 'glutil.c',
                 'headerbuttons.c',
@@ -150,6 +151,7 @@ src_env.Append (CPPPATH = ['#/intern/guardedalloc',
                            '../readstreamglue',
                            '../img',
                            '../quicktime',
+                           '#/intern/elbeem/extern',
                            '#/intern/ghost',
                            '#/intern/opennl/extern'])