Vadym accidentally called view() directly on an R-value frame, which
leads to a dangling view pointer.
Adjusted code such that compiler throws an error if called on an R-value
frame.
Co-authored-by: Erik Fröjdh <erik.frojdh@psi.ch>
- No changes or evaluation of existing tests
- Tags for including tests that require data is changed to
**[.with-data]** and **--with-data** for C++ and python respectively
- Minor update to docs
- Added missing files to the test data repo
