Replace deprecated AM_CONFIG_HEADER with AC_CONFIG_HEADERS
Remove unnecessary call to AM_INIT_AUTOMAKE

That macro is already called DUNE_AC_INIT.  See FS 1462.
Update pkg-config file
Properly quote includes
Make dependency on dune-geometry explicit
Add files needed for building with cmake
Add cmake support and update build system

Besides adding cmake support some build system files
have been updated to how they would look like when
created anew by duneproject. This leads to better
readability and more commments.
Add missing line
[bugfix] copy-paste error in FoamGridLeafIntersection::geometryInInside() and geometryInOutside()
[bugfix] Use proper path in the text for the dune-foamgrid module

Thanks to Alastair Radcliffe and Andreas Dedner for pointing this out.
Add various missing headers

This makes 'make headercheck' _almost_ pass.  There's is one issue left
which I don't quite understand right now.  I leave that for another day.
[bugfix] Remove spurious ')'
[cleanup] Remove trailing whitespace
1d foamGrid
deleted foamgridelements.hh