Started modifiying refinement in Foamgrid
debugging foamgrid code
Added debugging example
Added grid view methods to space class
Barycentric Refinement is implemented.
Merge branch 'operator_preconditioning' of github.com:bempp/bempp into operator_preconditioning
Added a barycentric refinement flag to grid
Merge fixes
Merged back to master
Merge branch 'master' of github.com:bempp/bempp
Updated Examples CMake File
Merge complete and updated grid levels in Spaces class.
Working on the changes in Space classes