Specify dependencies as one list, including args

Allow arguments to be used on the list of dependencies, this facilitates
searching for things like e.g. Boost, and there is now only need for one
list since REQUIRED can be one of the arguments.

cmake/Modules/Finddune-common.cmake

@@ -15,12 +15,11 @@ find_opm_package (
   # module name
   "dune-common"
 
-  # required dependencies
-  "BLAS;LAPACK"
-
-  # optional dependencies
-  ""
-
+  # dependencies
+  "CXX11Features REQUIRED;
+  BLAS REQUIRED;
+  LAPACK REQUIRED
+  "
   # header to search for
   "dune/common/fvector.hh"