ufz/ogs: M and HM processes with Lower-Interface Elements.

The highlight of the release is the implementation of the Lower-Interface Elements for both the small deformation process (M) and hydro-mechanics process (HM) allowing fractures to be incorporated in the solution domain. For the liquid flow and two-phase flow processes several material models for the fluids pressure, density, permeability, and viscosity were added.

• Implementation of hydro-mechanics (HM) with LIE. #1537-#1541
• Implementation of small deformation (M) with LIE. #1452
• Fracture constitutive models. #1434
• Hydro-Mechanics process. #1508
• First version of monolithic hydro-thermal process implementation with Boussinesq approximation using constant viscosity. #1534
• Two phase flow process with pp model implementation. #1530
• Richards flow process implementation. #1473
• Liquid process. #1468
• Classes for relative permeability models. #1531
• Classes for capillary models. #1517, #1578
• Ehlers single-surface yield function constitutive relation model. #1556
• Support scaling, GMRES, and Pardiso in Eigen linear solvers. #1509 #1510
• Piecewise linear Monotonic curve and a generic curve parser. #1529
• Support searching boundary nodes in MeshLib::NodeSearch. #1459
• Support specifying the shape function order in process variables. #1503
• Command line option --unbuffered-std-out to deactivate buffer for standard output. #1514
• CMake option OGS_FATAL_ABORT for debugging. #1432
• Set the default OGS_LOG_LEVEL to debug in release builds. #1522
• Add integration order in input files. #1464

New utilities:

• createQuadraticMesh #1500
• convertToLinearMesh #1554
• postLIE #1555

New features:

• extend NodeReordering to correct ordering of nonlinear nodes #1519

• Ctest now works on Windows too by removing time-wrappers. #1480
• Moved to public Jenkins instance at jenkins.opengeosys.org. #1505
• Doxygen warnings parser in Jenkins will mark a build as unstable if there are Doxygen warnings. #1585
• Benchmarking on Jenkins now saves the standard output into a file for each test. #1528

• Fix LocalToGlobalIndexMap with mutliple variables and with multiple componets. #1433 #1440
• Fix PropertyVector<T*> for multi-component case. #1441
• Fix checking IDs of nonlinear nodes. #1495
• Fix incorrect use of getNumberOfBaseNodes(). #1515
• Fix computing sparsity pattern for mixed shape function order cases. #1548
• Fix that iterations and residuals were not printed when Eigen linear solver fails. #1499
• Fix all of the Doxygen warnings in the code. #1569 #1573
• Fix all of the input file/keyword documentation and its generation.