indent with astyle
Merge pull request #91 from tjhei/pr_astyle

indent with astyle
Add back the spirit sublibrary of boost.

We apparently need it from the serialization sublibrary.
Add forgotten header file.
Merge pull request #116 from bangerth/add-missing-spirit-lib

Add back the spirit sublibrary of boost.
Only test indentation on pull requests.
Merge pull request #117 from luca-heltai/travis_ci_indent_check

Only test indentation on pull requests. This closes issue #89, where we discussed about possibly testing with Travis CI the indentation of the pull request.

Since most of the pull requests are failing anyway on Travis (time limit for a pull request is 25 minutes, and we hit it pretty regularly), this pull request configures Travis CI to only check indentation in pull requests, and do the full build only when the pull request is merged on master.
Removed all builds. Only indent test.
Moved download and install of astyle into before_install section. Renamed files.
Merge pull request #118 from luca-heltai/fix_travis_ci

Removed all builds. Only indent test.

I implemented here Matthias' suggestion. Removing all unnecessary comments and lines from the Travis CI configuration scripts. This should also make it much faster, since we don't need to install anything anymore (except astyle). This is the one that closes #89.
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
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.
Update description.
Link in step-53.