add a centralized file to eventually hold all doxygen groups.  Put a group there for GeometryType and put GeometryType in it.  This fixes FlySpray issue 237

[[Imported from SVN: r4836]]

grrr! testing for !=0 skips row zero.

loops now start with n and the first step is --i and we are testing
for i>0.

[[Imported from SVN: r4833]]

[[Imported from SVN: r4832]]

Bug fix: dont know what exactly the bug was. just experimented by merging (svn merge -r 4830:4823 fmatrix.hh) version 4823 and it did work. atleast the fmatrixtest is working. perhaps Markus can point out what the bug was

[[Imported from SVN: r4831]]

The check i>=0 is always true if i is unsigned!

[[Imported from SVN: r4830]]

[[Imported from SVN: r4828]]

simplevector.hh is not there any more.

[[Imported from SVN: r4825]]

Solving was correct, too. 
Unfortunately the the proposed solution of the test was wrong.

[[Imported from SVN: r4824]]

Invertion works now.

But there is still a bug in the solve method. I will fix this later
this afternoon. be patient!

[[Imported from SVN: r4823]]

I think one should check prod instead of A here, shouldn't one?

[[Imported from SVN: r4822]]

[[Imported from SVN: r4819]]

Reduced redundant code.

Fixes Flyspray #223

[[Imported from SVN: r4818]]

[[Imported from SVN: r4817]]

[[Imported from SVN: r4816]]

[[Imported from SVN: r4815]]

[[Imported from SVN: r4812]]

[[Imported from SVN: r4811]]

[[Imported from SVN: r4803]]

[[Imported from SVN: r4797]]

[[Imported from SVN: r4794]]

[[Imported from SVN: r4791]]

Rely on MPI daemons being started.
mpi start scripts not needed any more

[[Imported from SVN: r4790]]

[[Imported from SVN: r4784]]

Use C++ headers instead of C headers

[[Imported from SVN: r4783]]

[[Imported from SVN: r4782]]

[[Imported from SVN: r4780]]

[[Imported from SVN: r4779]]

Fixed a serious bug. (At least sum was not O.K. when working with an
inout array. We really have to allocate an out array and copy the
results.)

Made mpicollectivecommunication more generic and reduced code duplication.

There are to new functions (allreduce) than can be given a binary
function (e. g. std::plus) representing the calculation.

[[Imported from SVN: r4778]]

The collective operations now work with simple C arrays.

[[Imported from SVN: r4777]]

[[Imported from SVN: r4775]]

and therefor function calls lost. 


[[Imported from SVN: r4774]]

you can not rightmultiply a (n,m)-matrix
by a (n,n)-matrix but by (m,m)-matrices


[[Imported from SVN: r4770]]

[[Imported from SVN: r4768]]

product.  Measuring the impact on efficiency gave the same results
as for the older TMP stuff.  When compiled with -O3 (g++ 4.1), there
is no measurable speed difference between the old and the new code.
That is so even though temporary variables had to be inserted.
When compiling without optimization, the new code is faster,
presumably because a standard for-loop is faster than a cascade
of function calls.  Depending on your vector size, this speedup
can be considerable!  For a six-entry FieldVector repeatly computing
norms gets about 40% faster.

This concludes FlySpray issue 46.

[[Imported from SVN: r4759]]

[[Imported from SVN: r4758]]

NDEBUG is not defined. 


[[Imported from SVN: r4757]]

which can be used for void interface methods. 


[[Imported from SVN: r4756]]

DUNE_DEVEL_MODE defined, because using this macro leads to an extra method
call. 



[[Imported from SVN: r4755]]

[[Imported from SVN: r4754]]

[[Imported from SVN: r4753]]