Adjust normalize.pl for p4est 1.1+.

We have a number of tests that use p4est output functionality, but the
format p4est writes in has changed in recent p4est versions. Delete the
lines that differ in normalize.pl and adjust stored test output files
accordingly.
Merge pull request #266 from bangerth/adjust-tests-for-p4est-1.0+

Adjust normalize.pl for p4est 1.1+.
Fix testsuite, cleanup tests in arpack/
Fix mathjax on website broken due to https

The dealii.org webserver now tries to serve https sites. This breaks mathjax because of:

Mixed Content: The page at 'https://www.dealii.org/developer/doxygen/deal.II/step_31.html' was loaded over HTTPS, but requested an insecure resource 'http://cdn.mathjax.org/mathjax/latest/MathJax.js'. This request has been blocked;

This commit fixes this by loading it over https.
Merge pull request #268 from tjhei/fix_mathjax_on_website

Fix mathjax on website broken due to https
Merge pull request #267 from tamiko/fix_testsuite

Fix testsuite, and cleanup the test in arpack
silence icc warning #15531 "A porition of SIMD loop is serialized"
Merge pull request #269 from tamiko/make_icc_happy

silence icc warning #15531 "A porition of SIMD loop is serialized"
Avoid compiler with gcc 4.7
Pass TriaIterator<DoFCellAccessor> by reference ant not by value

This makes the interface of FEValues::reinit consistent between Triangulation::cell_iterator and DoFHandler::cell_iterator.
Merge pull request #270 from kronbichler/master

Two small unrelated patches