Fixed install files for step-54.
Merge pull request #253 from luca-heltai/fix-step54-install-files

Fixed install files for step-54.
Fix uninitialized variables in Utilities::MPI::MinMaxAvg
Merge pull request #254 from kronbichler/fix_mpi_min_max_avg

Fix uninitialized variables in Utilities::MPI::MinMaxAvg
fixed a bug in set_matrix_mode.

STSetMatMode shall be called only after transformation_data->st
is initialised. Thus, we need to store the desired STMatMode
untill set_context is called from the solver object.
Merge pull request #246 from davydden/set_matrix_mode

fixed a bug in set_matrix_mode.
Proof read the changelog file.
Merge pull request #255 from bangerth/changelog-fixes

Proof read the changelog file.
Enable vectorization of vector updates in Chebyshev preconditioner

Use DEAL_II_OPENMP_SIMD_PRAGMA annotation. To avoid a bug in gcc, use an additional
boolean in the 'if' statement that avoids checking factor1 == Number().
Re-fill comments in precondition.h
Merge pull request #252 from kronbichler/master

Enable vectorization of vector updates in Chebyshev preconditioner
Documentation: Remove references to svn

Remove references to svn's $Id$ in the headers and replace references to
the old subversion repository in various html files
Documentation: Remove bogus indentation.html file

Well, we already have a detailed doxygen file about indentation. So it is
better to add the three relevant lines about astyle there and remove this
additional documentation page completely
Documentation: Remove svn.html from offline documentation

The new development guidelines for git should be prominently on the
homepage, not buried in the offlinedocumentaiton. So just remove the old
cruft.
Documentation: Remove all references to external resources

We already link to this  external resources on the homepage - there is no
point in doing it here (nobody will find it and it has the bad tendency of
being out of date).
Documentation: also cleanup toplevel TOC

Remove all external references and stale content from the toplevel
documentation TOC
Documentation: remove stale html files

Remove news.html and publications/indexl.html stubs - they are not
referenced any more.