[Core] Fix brep node children on netbeans 7.1

http://netbeans.org/bugzilla/show_bug.cgi?id=212510
[mesh-algos] Fix amibe node children on netbeans 7.1

http://netbeans.org/bugzilla/show_bug.cgi?id=212510
[Core] NullPointerException in all geom operators (Netbeans >= 7.1)
[Amibe] make an assert more verbose
[mesh-algos] Fix an UnsatisfiedLinkError with Java 7
[vtk-util] picking: fix segfault on some systems
[mesh-algo] Fix an UnsatisfiedLinkError
[Amibe] LenghtDecimateHalfEdge: collapse edges at their center

They were collapsed at an extremity.
[vtk] no longer forget LSDyna.dll in the zip
[Amibe] remesh.py: safe_coplanarity = 0.8 (was 0.4)
[mesh-algos] Fix a NullPointerException
[suite] Fix ant build-zip: clear the cluster before all
[Amibe] MeshExporter: Use AmibeReader and fix a NullPointerException

The NullPointerException occured because group IDs are no longer integer
but strings. MeshExporter constructors have been updated to work on
String[].
[Amibe] Fix fuse group action and remove Group.set/getId
[Amibe] SmoothNodes3DBg: project in the same group as the original point
[Amibe] Remesh: do not project on different group
[Amibe] Cosmetics
[Amibe] Change 3rd argument of MeshLiaison.backupAndMove

It now contains the group identifier if vertex has to be moved only
on this group.  If this argument is -1, no check is performed.

Add a similar argument to MeshLiaison.move
[Amibe] Always add -1 group in Skeleton constructor

The RemeshTest junit test fails otherwise.
[Amibe] Avoid useless (and costly) calls to LocationFinder.walkDebug

These calls had been added to ensure that vertex projections are right,
but they are very expensive and useless most of the times.
Here we keep them only when smoothing.