Compliant: deactivating RigidMass drawing by default

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11163 b7f1a160-662a-0410-a6d8-bea165342f16
Added an example with multiple picking

On startup, a popup explains how to interact

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11164 b7f1a160-662a-0410-a6d8-bea165342f16
removed the unused QtOnePick example.

Single picking (as well as a basic GLUT interface) is illustrated in glutOnePick, while multiple picking (as well as a basic Qt interface) is shown in QtMultiPick

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11165 b7f1a160-662a-0410-a6d8-bea165342f16
update eigen to 3.2.1

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11166 b7f1a160-662a-0410-a6d8-bea165342f16
Compliant: adding an alternative python API (package StructuralAPI).


git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11167 b7f1a160-662a-0410-a6d8-bea165342f16