design review (!22) · Merge requests · Matthias / feltor

The new features are

completely reworked geometry and grid backend due to a major design bug in the old implementation
completely reworked DS and Fieldaligned classes to incorporate Stegmeirs grid rerinement and to implement it for structured grids
completely reworked interface for fluxfunctions in the geometries package. The new interface is simpler than the old one and makes code more readible. However, the grid generation is a bit slower due to the virtual function call overhead
```
     multigrid/nested iterations
```
Optimizations thanks to HLST and Harald Servat. Especially the matrix - vector multiplication
new blas1 functions that contain higher workloads
completely reworked documentation including code examples and pdf writeupts ( generate the new docu in feltor/doc by typing make)
reworked READMEs in feltor/README and feltor/config/README in especially I changed from markdown to asciidoc, which seems to be more powerful. Same for the wiki pages
Header: in the new system the only headers to include are dg/algorithm.h and geometries/geometries.h and file/nc_utilities.h That is especially interesting when using FELTOR as an external library, i.e. you don't have to place all src projects into feltor any more

design review