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]]

[[Imported from SVN: r4835]]

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: r4829]]

[[Imported from SVN: r4828]]

[[Imported from SVN: r4826]]

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]]

build system.

Fixes flyspray #215

[[Imported from SVN: r4821]]

[[Imported from SVN: r4820]]

[[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: r4814]]

[[Imported from SVN: r4813]]

[[Imported from SVN: r4812]]

[[Imported from SVN: r4811]]

[[Imported from SVN: r4810]]

[[Imported from SVN: r4809]]

[[Imported from SVN: r4808]]

[[Imported from SVN: r4807]]

[[Imported from SVN: r4806]]

- just giving a more verbose error message doesn't solve the problem

- The issue has been solved within UG.  The UG build system now aborts
  when --enable-dune is set but not __cplusplus.  I had just forgotten
  to close the issue.  Beg your pardon.

Please try to avoid unrelated indentation and whitespace changes in
patches, as the diffs become more difficult to read.



[[Imported from SVN: r4805]]

It's my pleasure....


[[Imported from SVN: r4804]]

[[Imported from SVN: r4803]]

[[Imported from SVN: r4802]]

[[Imported from SVN: r4801]]

[[Imported from SVN: r4800]]

[[Imported from SVN: r4799]]

[[Imported from SVN: r4798]]

[[Imported from SVN: r4797]]

[[Imported from SVN: r4796]]

[[Imported from SVN: r4795]]