Major cleanup
Originally this branch was intended to only integrate dune-alugrid support, but it ended up in major cleanup. It now features:
- dune-alugrid is used everywhere
- StructuredGridFactory is used instead of src/utility/gridexamples.hh
- Some tabs in the white space disappeared
- All changes are compliant with cmake, esp. those that require files in the build directory
- The mimetic code has been removed
- All applications have been successfully run with all grid managers
This branch is only intended to make everything work with cmake and dune-alugrid. I have seen hundreds of things which could be changed/improved while working on it...
Fixes #1 (closed).