try to get the arpack test a bit more stable

Well, it turns out that depending on arpack version and CPU the result for
the first 5 eigenvalues differs. Try to make this a bit more stable by
computing 8 eigenvalues and only print the first 5.
Update normalize.pl to also substitute 8.2.pre version
Merge pull request #347 from tamiko/update_normalize

Update normalize.pl to also substitute 8.2.pre version
Merge pull request #346 from tamiko/fix_arpack_test_v2

try to get the arpack test a bit more stable
fix doxygen warnings
Merge pull request #348 from tjhei/doxygen_fixes

fix doxygen warnings
Fix copyright years in doc/users/doxygen.html

The year 2013 is already included in the range 2012 - 2014.
Add instantations for class RungeKutta.
Merge pull request #352 from Rombur/fix_step_52

Add instantations for class RungeKutta.
Merge pull request #350 from felgru/doxygen

Fix copyright years in doc/users/doxygen.html