Merge branch 'feature/eigen3' into 'develop'

CMakeLists.txt

README.md

src/algebra/CMakeLists.txt

src/algebra/DenseMatrixWrapper.hpp

src/algebra/Eigen3Utils.hpp

src/algebra/EigenvalueSolver.cpp

src/algebra/EigenvalueSolver.hpp

src/algebra/EigenvalueSolverOptions.cpp

src/algebra/EigenvalueSolverOptions.hpp

src/algebra/LinearSolver.cpp

src/algebra/LinearSolver.hpp

src/algebra/LinearSolverOptions.hpp

src/algebra/PETScUtils.hpp

src/algebra/VectorWrapper.hpp

src/language/modules/LinearSolverModule.cpp

src/utils/BuildInfo.cpp

src/utils/BuildInfo.hpp

src/utils/PugsTraits.hpp

src/utils/PugsUtils.cpp

src/utils/checkpointing/Checkpoint.cpp