** linear/angular joints:
We don't need the linear and angular joints for soft bodies.
Actually these joint's are pulling the soft body towards (0, 0, 0).
The soft body is anchored with the rigid one, so limiting the rigid body
angular and linear movements seems to be enough.
** soft body configs:
Some soft body configurations were tweaked to fix issues of instability
of soft bodies.
** soft body hardness API:
Soft body hardness API was introduced as well.
** points of deformation:
The points of deformation were inverted;
** soft body mass:
Fixed issues with soft body mass changing, now it doesn't "explode" after
changing its mass.
Patch by: Leandro Dorileo <dorileo@profusion.mobi>
SVN revision: 76560
3ecddb724a