Separated matrix lib into own repo.

.gitmodules

CMakeLists.txt

cmake/common/px4_base.cmake

cmake/ros-CMakeLists.txt

src/lib/mathlib/math/Matrix.hpp

src/lib/matrix

.../local_position_estimator/BlockLocalPositionEstimator.cpp

.../local_position_estimator/BlockLocalPositionEstimator.hpp

src/modules/local_position_estimator/CMakeLists.txt

src/modules/local_position_estimator/matrix/.gitignore

src/modules/local_position_estimator/matrix/CMakeLists.txt

src/modules/local_position_estimator/matrix/src/Matrix.hpp

...dules/local_position_estimator/matrix/test/CMakeLists.txt

src/modules/local_position_estimator/matrix/test/inverse.cpp

...local_position_estimator/matrix/test/matrixAssignment.cpp

...dules/local_position_estimator/matrix/test/matrixMult.cpp

...local_position_estimator/matrix/test/matrixScalarMult.cpp

...ules/local_position_estimator/matrix/test/setIdentity.cpp

...odules/local_position_estimator/matrix/test/transpose.cpp

...local_position_estimator/matrix/test/vectorAssignment.cpp