QuadReferenceSpace + ReferenceSpace::inorder(): Seems OK \o/ -- Adding QuadLagrange -- Now all LagrangeBasis are using pointsGenerator

this amkes it easier to ship bundles (e.g. gmsh+getdp)

Default implementation of the inner radius in case LAPACK is not available. Give the same value in case of a square 

Minor Fix: TriNodeBasis face functions -- Add QuadFaces to ReferenceSpace -- QuadNodeBasis: Edges OK -- QuadFace: Orientation is *WRONG*

in rundgpy and replace it by a hack in gmshpy::__init__ so that gmshpy
can be load as a standard python module even if linked with openmpi
(compiled with dynamic modules)
standard module

dg: stereographic 3d operators. Diffusion stereo. Artificial diffusion stabilization. FunctionIntegrator: removed unneded printf

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A new implementation for gamepad. option "-gamepad" is needed now. If no option, gamepad can be seen but nothing happens. 
All functionalities with "-gamepad", even if no gamepad is plugged when gmsh is launched. 
Gamepad can be plugged or desactivated during execution.