merge to release

[[Imported from SVN: r5880]]

merge to release

[[Imported from SVN: r5879]]

merge to release

[[Imported from SVN: r5877]]

merge to release

[[Imported from SVN: r5875]]

* add a specialization of sqrt to fvmeta, this should fix the
  ambiguous sqrt(int)

merge to release

[[Imported from SVN: r5874]]

[[Imported from SVN: r5873]]

constructor and reset() taking a deleter.

This solves the issue with bcrsmatrix.hh in fs#727.

Please merge to release.

[[Imported from SVN: r5871]]

*test correctness of pointer returned by get()
*added test for get() on empty shared_ptr
If you're happy the last test currently fails with a segfault.

Please merge to release

[[Imported from SVN: r5870]]

[[Imported from SVN: r5869]]

gcc-4.4 failed to compile the shared_ptrtest with ''NULL was not declared in this scope''. Introduced usage of null_ptr to fix this.


[[Imported from SVN: r5868]]

[[Imported from SVN: r5866]]

[[Imported from SVN: r5865]]

[[Imported from SVN: r5860]]

[[Imported from SVN: r5859]]

[[Imported from SVN: r5858]]

[[Imported from SVN: r5857]]

[[Imported from SVN: r5856]]

[[Imported from SVN: r5853]]

* Libraries are in .../lib, not .../libs.
* When using AC_CHECK_LIB, the -L option has to be put into LDFLAGS
  temporarily.  Use DUNE_CHECK_LIB_EXT, which does that automatically.
* Clear the output variables if GMP was not found.
* Put result into ALL_PKG_* instead of DUNE_PKG_*

[[Imported from SVN: r5852]]

useful for other peaple as well, move it from dune-localfunction to
dune-common.

[[Imported from SVN: r5851]]

put -L into LIBS.
Add to ALL_PKG_*

[[Imported from SVN: r5850]]

[[Imported from SVN: r5849]]

[[Imported from SVN: r5848]]

[[Imported from SVN: r5847]]

[[Imported from SVN: r5846]]

that automatically.

[[Imported from SVN: r5845]]

[[Imported from SVN: r5844]]

[[Imported from SVN: r5843]]

LOCAL_LIBS is meant to do.  Also remove the bad example of passing
preprocessor flags in CXXFLAGS from duneproject.

[[Imported from SVN: r5842]]

fix "FS#711 - GRIDDIM not in ALL_PKG_CPPFLAGS"

[[Imported from SVN: r5841]]

[[Imported from SVN: r5840]]

DUNE_COMMON_CHECKS macro into the DUNE_MPI macro.

Also add the GL flags to the ALL_PKG_* variables.

[[Imported from SVN: r5839]]

[[Imported from SVN: r5838]]

[[Imported from SVN: r5837]]

[[Imported from SVN: r5836]]

[[Imported from SVN: r5835]]

libs to the ALL_PKG_* family of variables and DUNE_ADD_MODULE_DEPS to add
flags and libs to the DUNE_* family of variables and the modules variables.
Use those macros in DUNE_CHECK_MODULES.

[[Imported from SVN: r5834]]

Rewrite the DUNE_CHECK_LIB_EXT macro:

 * Essentially copy and adapt the definition of AC_CHECK_LIB.  This should
   make sure the two macros behave the same even in corner cases (except for
   the added functionality, of course).

 * Properly document what exactly is allowed in the arguments.

[[Imported from SVN: r5833]]

[[Imported from SVN: r5832]]

[[Imported from SVN: r5831]]