If an iterator facade (like entity iterators) wants to allow the
embedded implementation to return either an (internally stored)
reference or a temporary object and expose these two behaviors to enable
performance optimizations, operator->() needs special handling: If the
implementation returns a reference, operator->() in the facade can
simply return the address of the referenced object, but if the returned
object is a temporary, we need to capture and store it in a helper
object to make sure it outlives the member access.

This patch adds a little helper function that tansparently handles both
cases.

IteratorRange is a cheap, throwaway container to implement support for
range-based for loops if the underlying containers doesn't provide
standard begin() / end () methods.

These headers were moved in Dune 2.3.

This implementation of an IdentityMatrix does not hold any data. It
implements a reduced version of the DenseMatrix interface including a
standard C++ cast operator to a Dune::FieldMatrix. This code illustrates
the new forward capabilities of DenseMatrixAssigner.

Thanks to Tobias Malkmus for the heads-up.

The majority of developers favor individual headers for (emulation of) C++11
features over collecting them in a single header cxx11.hh. This patch
renames cxx11.hh to constexpr.hh and moves it into the subdirectory std.
This is the place most developers would like these headers in (see
http://users.dune-project.org/doodles/4).

As decided on the developer meeting in Aachen, we support (but do not
rely on) the C++11 keyword constexpr. This patch adds an m4-check for
constexpr and a header (cxx11.hh) defining a macro DUNE_CONSTEXPR either
as constexpr or empty (depending on the compiler support for it). It is
then used in FieldVector and FieldMatrix on size, rows, and cols.

[[Imported from SVN: r7415]]

[[Imported from SVN: r7414]]

Initial message of blocked patch was : Adjusted CMakeLists.txt according to added files.

[[Imported from SVN: r7357]]

[[Imported from SVN: r7000]]

[[Imported from SVN: r6988]]

[[Imported from SVN: r6960]]

[[Imported from SVN: r6946]]

[[Imported from SVN: r6892]]

[[Imported from SVN: r6808]]

"lib1 lib2 lib3", which caused an error!)

[[Imported from SVN: r6755]]

[[Imported from SVN: r6748]]

[[Imported from SVN: r6747]]

libraries under the same name.

[[Imported from SVN: r6731]]

modul name (lower case with dashes).

These leads to kind of weired variabable names (dune-common_DIR,
dune-common_LIBRARIES, etc.) but finds non-installes modules
easier. You just sets CMAKE_PREFIX_PATH to the directory containing
the modules.

[[Imported from SVN: r6724]]

test directory is excluded from all and apparently not considered
during make install

[[Imported from SVN: r6674]]

infrastructure to use the module with cmake.

Currently, only an installed dune-common can be used, as the others
lack the cmake confguration files. One has to provide the
CMAKE_MODULE_PATH pointing to the directory where
e.g. DuneMacros.cmake is installed (PREFIX/share/cmake/modules) and 
DuneCommon_DIR pointing to PREFIXlib/cmake.

The ${CMAKE_BINARY_DIR}/config.h.cmake of the project is created such
that it includes section from modules that it depends on as well as
the ${CMAKE_SOURCE_DIR}/config.h.cmake. This prevents user from
creating a full file by hand.

Renamed package configuration files according to the style of the 
other modules.

[[Imported from SVN: r6661]]

have to specified during linking because it is implied by dunecommon.

[[Imported from SVN: r6644]]

Produce and install a preliminary  package configuration file.

[[Imported from SVN: r6641]]

  directories. This seems to be more manageable.
- Deactivated building of the test during make all. Seems annoying to
  our users.
- Introduced make check mimicing autotools.

Tests still fail where they should not.

[[Imported from SVN: r6610]]

The documentation is still not built and therefore not installed

[[Imported from SVN: r6602]]

Create libdunecommon.la in the right directory.

[[Imported from SVN: r6589]]

directory.
[CMake] make builds more than half of the tests.

[[Imported from SVN: r6580]]

Only ctest is working.

[[Imported from SVN: r6577]]