Merge pull request #51 from ruribe/master

Restablishing Observer and Observable dependency
Adding the file Metadata.xml in Src/DataStructures/ImageData/
Add a Manifold/cube.off and a NonManifold/cubeNonMan.off useful for testing.
new simple meshes for testing.
minor modifications on Remeshing/RemeshingBaseOperations.h and LaplacianSmoothingMeshFilter.h
Add Data directory dependency (in a generic way) for easier testing.
XERCESC configuration : take env variable when defined
Merge pull request #52 from vvidal/master

Minor modifications for easier testing : add a manifold mesh and 2 non-manifold meshes + add Data directory depency in Test (data used for testing should be put in the Data directory)
cmake and ui updates
delete Armadillo.raw too big for github...
Add a new data structure for non-manifold meshes (not finished yet)
Merge branch 'master' of github.com:MEPP-team/Gharial
Add a new data structure for non-manifold meshes
Error in BaseDecorator.hxx corrected.
Basic AIF interface ok.
update Visualization and Controller interaction
Added BaseVertex, BaseEdge and BaseFace
some modifications in the data structure AIF
Merge branch 'master' of github.com:MEPP-team/Gharial
Some improvements in AIF data structure