Merge branch 'feature/FS1557-add-all-flags-by-default-infrastructure'

This branch adds the required infrastructure to automatically enable all
external packages and Dune-internal libraries for all targets inside a
given Dune modules. For this purpose, it adds a number of new CMake
macros:

- dune_enable_all_packages is the central macro that needs to be called
  in the main CMakeLists.txt of your project.

- dune_library_add_sources is an optional macro that you only need if
  your project also contains a library and you want your executables to
  automatically link against that library. Note that this support
  requires CMake 3.1. Most user modules don't create their own libraries
  and can thus ignore this macro.

- dune_register_package_flags has to be called in all configuration
  tests to register the outcome of the test so that
  dune_enable_all_packages can automatically add the required compiler
  and linker flags required to use the library that the configuration
  test has been written for.

The branch also adds the required calls to dune_register_package_flags
to all configuration tests in dune_common.

There is a similar branch in dune-grid that updates the configuration
tests in that module.

* feature/FS1557-add-all-flags-by-default-infrastructure:
  [CMake] dune_library_add_sources: Add some sanity checks
  [CMake] dune_enable_all_packages: Add sensible scoping to macro variables
  [CMake] Avoid duplicate version warnings in dune_library_add_sources
  [CMake] dune_enable_all_packages(): Add version check to library support
  [CMake] Clean up dune_enable_all_packages() and fix library handling
  [CMake][ParMETIS] Fix some typos in dune_register_package_flags() call
  [CMake] Export project revision as ProjectVersionRevision
  Fix c&p error in verbosity code
  Introduce an APPEND parameter on the dune_register_package_flags macro
  Issue a warning when the registry macros parameters cannot be parsed
  Introduce an optional VERBOSE argument on the dune_enable_all_packages macro
  Introduce a macro dune_register_package flags to be used by find modules
  [CMake] Move the enable_all_packages feature to a separate module
  Update the duneproject script to ask the user whether to use all flags
  Introduce a macro that adds all flags to all targets
  Update all find scripts split definitions from includes
  Split ALL_PKG_FLAGS into ALL_PKG_DEFS and ALL_PKG_INCS