Updated the tutorial and its description in the handbook to use implicit instead of coupled and sequential instead of decoupled.

Change color of blocks in figure from black to blue.


git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@15461 2fb0f335-1f38-0410-981e-8018bf24f1b0

changes as discussed in the handbook meeting


git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@15076 2fb0f335-1f38-0410-981e-8018bf24f1b0

Restructured handbook and handbook files as we discussed
it in the handbook meeting. This change is hardly reviewable
so please compile and check whether you miss something in the
new version of the handbook or the structure appears weird.

The models have been removed, because they are just a copy from the
doxygen description and we decided to refer to the doxygen homepage
for a detailed description (which also upgrades doxygen).



git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@15030 2fb0f335-1f38-0410-981e-8018bf24f1b0