Frederik Hennig authored Feb 02, 2021 and Markus Holzer committed Feb 02, 2021

- Now applying pre-simplification on CQE, too
- Added zero and alias insertion
- Bugfix

Frederik Hennig authored Nov 09, 2020 and Markus Holzer committed Nov 09, 2020

- Removed Test Notebooks
- Fixed PeriodicityHandling API
- Added GPU and OpenCL Periodic Pipe tests
- A few more minor tweaks

This restructuring allows for easier separation of modules into
separate repositories later. Also, now pip install with repo url can be
used.

The setup.py files have also been updated to correctly reference each
other. Module versions are not extracted from git state

boundary conditions can specify how the index list should be built:
- list coordinates of domain or boundary cells (previous always inner)
- list all links or only the first link

- boundaries with same name have not been displayed correctly

- removed warnings
- added flake8 as CI target

- test run again
- notebooks not yet

- assignment collection
- sympyextensions

- Previously sympy.Eq was used to represent assignments. However Eq
  represents equality not assignment. This means that sometimes sympy
  "simplified" an equation like a = a  to True,
-> replaced sp.Eq by pystencils.Assignment everywhere
- renamed EquationCollection to AssignmentCollection

- in-kernel Neumann boundaries
- flag-interface for boundary handling makes one flag field multiple
  boundary handlings possible
- generator: support for bitwise logical operators

- splitted existing LBM boundary handling into two parts:
    -> generic part , that is used for FD as well and moved it to pystencils
    -> LBM specific part - remained in lbmpy

- bugfixes

- plotting
- calculation of force on boundary
- vtk outpu

- scaling interface width eta instead of surface tensions tau to correct
  interface profile & surface tensions

- single function to create kernel for specified target
- data type creation from string - reuse numpy functionality
- bugfixes in dot display

- added functions to compute force on boundary for generic boundary and
  NoSlip
- simple calculations for serial scenarios
- to distinguish between different obstacles, NoSlip boundaries can now
  be named

- renaming because of clashes with types.py from other packages

- boundary conditions can now define their own state
- boundary classes instead of functions
- no boundary name any more
  (instead the identity is defined via instances)
- updated tutorials accordingly
- boundary handling now gets pdf numpy array instead of pystencils field

previously the value was taken from the cell next to the boundary cell (i.e. the inner cell)

- getShearRelaxationRate is a free function now -> works also with cumulant methods
- better error message when calling kernels with wrong or too few parameters
- entropic & incompressible is not working by default due to pdf shift -> added NotImplemented exception
- new creation function for 'raw_mrt' where all relaxation rates can be independently specified
- enhanced entropic creation funtion, supports omega output field now