[common.float_cpm] rewrite * use one template which either redirects scalars to   dune-common and checks vectors componentwise * this template is then generated for eq, ne, gt, lt, ge and le
[common.float_cpm] rewrite
* use one template which either redirects scalars to
  dune-common and checks vectors componentwise
* this template is then generated for eq, ne, gt, lt, ge and le

renemilk/DUNE-Stuff,renemilk/DUNE-Stuff,renemilk/DUNE-Stuff