[dune-pdelab] small issues with dune-pdelab-howto compilation

[Mladen Jurak]

Dear DunePDELab developers,

I have recently compiled dune-pdelab-howto and some pdelab
programs of mine (on Debian/testing system) and I found these problems:

In "dune-pdelab-tutorials/c++/doc/c++refresher.tex",
and "dune-pdelab-tutorials/tutorial06/doc/tutorial06.tex",
I had to change package "scrpage2" to  "scrlayer-scrpage"
since "scrpage2" is not distributed with texlive anymore.

In dune-pdelab: in file "dune/pdelab/backend/istl/bcrsmatrix.hh"
I had to put #include <dune/common/version.hh> before line 7
in order to compile the file.

In dune-pdelab: in file "dune/pdelab/finiteelementmap/CMakeLists.txt"
name "rt0simplex3dfem.hh" has to be added into "install" function.

Best regards,
Mladen Jurak

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