- The discretization cache is one file for all discretizations that must
  be shared between instances. Therefore, now the discretization cache
  locks the corresponding hdf5 file only as long as necessary. If it
  cannot get the lock, the cache file is simply ignored.
- The discretization cache is not considered as a potential calculation
  cache file any more.

mac-shallow-app uses c extensions again by searching libGR via `rpath` and
not `DYLD_LIBRARY_PATH`

-   Renamend *alternative cavities* to *center based cavities*
-   Added a switch to deactivate surface based cavities
-   Added a default value for the resolution (128)

before!)

- Visualization now uses the assigned context in the paint method
- Here-docs in build-flags are terminated correctly

are exported

additionally

creation and when the app folder is moved to another location

to the conda lib directory

On program startup prefixes are checked and fixed if needed