2.0 Release

[SLongshaw]

This request represents the MUI 2.0 update:

• Refactor code base into new directory structure
• Add new coupling algorithms
• Rename "chrono" filters to "temporal" to avoid conflation with STL and other projects
• Change API so functions that take two time_type values take a new iterator_type value instead
• Update C and Fortran wrappers
• Refactor Python wrapper for smaller footprint and CMake based build
• Update top-level CMake for refactored Python wrapper and directory structure
• Add standalone linear algebra capability mui::linalg
• Update RBF filter to utilise new mui::linalg package
• Add parallel capability to RBF filter
• Remove Eigen dependency and USE_RBF compile time parameter