Added volumePower attribute to Law2_PolyhedraGeom_PolyhedraPhys_Volumetric, Polyhedra code small cleanup
Reintroduce viscosity in SPH-modell.
Add RELEASE file.
Update changelog.
Remove RELEASE file.
Fix typo in SPH.
FlowEngine: set cell's id in periodic triangulations + couple smallfix
move computePoreThroatRadius() to 2PFlow
PolyhedraMat and PolyhedraPhys are now inherited from FrictMat and FrictPhys, modified related examples
Added Ig2_Sphere_Polyhedra_ScGeom
Added examples for Ig2_Sphere_Polyhedra_ScGeom, added ymport.ele function
Added documentation of Ig2_Sphere_Polyhedra_ScGeom
fix bad bugs in DFNFlowEngine following uninitialized 'isClump'
Move SPH-body parameters into body->state.

Recommended by Bruno:
http://www.mail-archive.com/yade-dev@lists.launchpad.net/msg10628.html
Add one more kernel function in SPH.
Change sign in calculation of viscosity in SPH
Simplify Lucy kernel function
Allowed Polyhedra-Wall interaction if Wall.sense==0
use the dedicated solver in DFNFlowEngine
some code documentation
FlowEngine: discard blocked cells completely when assembling the permeability matrix