Updated version test to gcc >= 4.1.
Added version test for clang >= 3.0.
Unfortunately I am not aware of the minimum required version of icc,
this test remains for icc >= 7.0.
White space adjustments.

[[Imported from SVN: r6985]]

[[Imported from SVN: r6983]]

Fixed some bugs in the documentation.
(This is revision 6977 all over again, but with the correct commit message.)

[[Imported from SVN: r6980]]

[[Imported from SVN: r6979]]

[[Imported from SVN: r6978]]

[[Imported from SVN: r6977]]

configure, even if MPI was found.

[[Imported from SVN: r6954]]

[[Imported from SVN: r6953]]

[[Imported from SVN: r6952]]

have been already seen by the linker. As DUNE_LIBS (e.g. dune-grid)
use symbols from other libraries already in ALL_PKG_LIBS (e.g. those of the
alugrid library), they should be appended to them.

On the other hand libtool removes duplicate libraries provided when
linking from, such that only the first occurence persits. Resulting
e.g. in libalugrid coming after libgrid.

This never caused problems because libtool added dependencies known to
it from the .la file automatically. But it does when using dune core
packages built with cmake (these lack .la files).

All tests of the core module pass (except one in virtual
refinement). Additionally dune-grid-howto build with ug and alugrid enabled.

[[Imported from SVN: r6949]]

Patch by Markus Blatt.

See FS 979

[[Imported from SVN: r6947]]

Patch by Elias Pipping

FS 1147

[[Imported from SVN: r6921]]

Patch by Elias Pipping

[[Imported from SVN: r6920]]

Patch by Elias Pipping

[[Imported from SVN: r6915]]

Patch by Elias Pipping, thanks.

FS 1147

[[Imported from SVN: r6914]]

As suggested by Christian in FS 1147.

Implemented by Elias Pipping.

[[Imported from SVN: r6913]]

[[Imported from SVN: r6897]]

[[Imported from SVN: r6896]]

add doc

[[Imported from SVN: r6895]]

[[Imported from SVN: r6890]]

[[Imported from SVN: r6889]]

[[Imported from SVN: r6888]]

[[Imported from SVN: r6887]]

[[Imported from SVN: r6886]]

oos-build broke the web-site
this fix actually checks where the sources are chooses the right directory

[[Imported from SVN: r6885]]

fix include order

[[Imported from SVN: r6884]]

remove dune-web support from top-rules

[[Imported from SVN: r6883]]

fix out-of-source build for latex and wml
-> fix oos-build for dune-grid-howto

[[Imported from SVN: r6882]]

improve error message for invalid module names

[[Imported from SVN: r6881]]

[[Imported from SVN: r6878]]

initialize result with 0
(patch by Matthias Wohlmuth)

[[Imported from SVN: r6877]]

[[Imported from SVN: r6876]]

[[Imported from SVN: r6875]]

error as it would have halted configure)

[[Imported from SVN: r6874]]

[[Imported from SVN: r6873]]

[[Imported from SVN: r6872]]

[[Imported from SVN: r6871]]

[[Imported from SVN: r6870]]

[[Imported from SVN: r6869]]

* the array synopsis in the standard uses struct, so why don't we?
* add method empty (demanded by the standard, many more are actually missing)
* consistently use std::size_t instead of size_t (for std::array it should even be std::size_t)
* simplify operator<<
* unify indentation (to 2)
* make_array is a function and not a method
* improve comments on the preprocessor branches (to improve readability)

[[Imported from SVN: r6868]]