add_types: only re-enable double-write check if it was previously enabled

See merge request pycodegen/pystencils!156

Fix sympy 1.6

See merge request pycodegen/pystencils!157

Skip llvm tests if llvmlite is not installed

See merge request pycodegen/pystencils!152

Add graphviz to interactive (it's require in first tutorial)

See merge request pycodegen/pystencils!153

Fix importing boundaryhandling if waLBerla module is available but without cpp_available

See merge request pycodegen/pystencils!154

BugFix of the fast_subs function in rng nodes.

See merge request pycodegen/pystencils!155

Opencl fixes

Closes lbmpy#9

See merge request pycodegen/pystencils!148

- corrected sorting 0.2.10 > 0.2.2

- tests are run in parallel to other jobs
  -> makes no sense to do performance testing there
  -> assertion randomly fails

Append assignments to KernelFunction (for later analysis etc.)

See merge request pycodegen/pystencils!140

cuda.TextureReference.set_array(tex_ref, cu_array) -> tex_ref.set_array(cu_array)

See merge request pycodegen/pystencils!134

Implement __hash__ for SympyAssignment

See merge request pycodegen/pystencils!142

Enable overriding of kwargs in SerialDataHandling.run_kernel

See merge request pycodegen/pystencils!143

Added guard around import to avoid failing when walberla is there but no python module is built

See merge request pycodegen/pystencils!147

FVM derivation: use a smaller stencil before trying brute-force to find the sparsest stencil

See merge request pycodegen/pystencils!146

Add remaining parameters from DataHandling.add_array to DataHandling.add_arrays

See merge request pycodegen/pystencils!138

Switch back to intersphinx sympy.org/latest ('coz it works)

See merge request pycodegen/pystencils!145