Add the first vectorized add and add flags to use OpenMP SIMD pragmas.
Align the underlying array of Vector and add runtime switched between add and vectorized add.
Replace transform by vectorized_transform.

Replace initialize_val by allocate and clear_val by deallocate.

Add vectorization to changes.h
Merge pull request #109 from Rombur/branch_vectorization

Vectorization (SIMD) of Vector
Fix compilation of Vector when configured with PETSc

this was introduced in e5f7ade
Merge pull request #119 from tjhei/fix_petsc_compile

Fix compilation of Vector when configured with PETSc
Suppress clang warnings when compiling bundled boost 1.56

Clang generates a bunch of warnings of the type:
bundled/boost-1.56.0/include/boost/preprocessor/tuple/eat.hpp:23:26: warning: variadic macros are a C99 feature [-Wvariadic-macros]
bundled/boost-1.56.0/include/boost/mpl/if.hpp:131:1: warning: empty macro arguments are a C99 feature [-Wc99-extensions]

This patch just disables those warnings. Also see https://code.google.com/p/dealii/issues/detail?id=252
Merge pull request #121 from tjhei/clang_boost_warnings

Suppress clang warnings when compiling bundled boost 1.56
Replace all occurrences of std_cxx1x by std_cxx11.

Keep the old files and namespace for backward compatibility.
Replace all occurrences of std_cxx1x by std_cxx11 also in tests/.
Merge pull request #111 from bangerth/replace-std_cxx1x-by-std_cxx11

Replace all occurrences of std_cxx1x by std_cxx11.
Fix an oversight in the previous patch in which we did not put stuff into the correct namespace.
Avoid setting the templated 'Number' to '0' (double) in trace(Tensor<2,dim,Number>).

Enables using trace also with e.g. Tensor<2,dim,VectorizedArray<double> >.
Merge pull request #124 from bangerth/fix-c++11-namespace

Fix an oversight in the previous patch in which we did not put stuff into
the correct namespace.
Replace the original attempt at providing step-53 by something real.

In particular, provide a step-53 that shows how to describe geometries
using charts and use a section of Earth under Eastern Africa as an
example. This has about the right level of complexity, and produces
awesome pictures.

This commit was generated from a number of smaller one:

More text.

Implement the Africa model for the WGS 84 geometry (actual topography still missing).

Provide the actual data set. Provide a way of reading it when not compressed.

Results and finish the program. Much still to be done.

More text.

Finish documenting everything.

Remove a picture we now no longer need.
Provide some cross-references to the new step-53.
Show some more results.
Add a changelog entry.
Clarify where the data comes from.
Cleanup stray merge conflict