* ported all old solver code to new api

CMakeLists.txt

Geo/GFaceCompound.cpp

Geo/GFaceCompound.h

Numeric/CMakeLists.txt

Numeric/gmshAssembler.h

Numeric/gmshConvexCombination.cpp

Numeric/gmshConvexCombination.h

Numeric/gmshCrossConf.cpp

Numeric/gmshCrossConf.h

Numeric/gmshDistance.cpp

Numeric/gmshDistance.h

Numeric/gmshLaplace.cpp

Numeric/gmshLaplace.h

Numeric/gmshLinearSystem.h

Numeric/gmshLinearSystemCSR.cpp

Numeric/gmshLinearSystemCSR.h

Numeric/gmshLinearSystemFull.h

Numeric/gmshLinearSystemGmm.h

Numeric/gmshTermOfFormulation.h

Solver/convexCombinationTerm.h