Debian packaging

This is a start of debian packaging. Several warts reared its head making this unusable as-is;

1) opm-core does not install its dune.module file. thus, we cannot generate  the buildsystem using dune-control with a system opm-core (at least not reliably - for opm core it isn't too bad since opm-core does not depend on other modules).
2) due to the usage of DUNE_CHECK_ALL in configure.ac no shared libraries are built. this breaks packaging expectations - system libs should be shared
3) the make check target is completely broken;
  - the test in grid/cpgrid/test does not link on my system (missing main method)
  - the highlighted test in grid/test depends on a source-distribution of dune-grid since it tries to grab a source from it (#include <dune/grid/test/gridcheck.cc>)
4) it does not install its dune.module file either