Testsuite: Move forgotten file to correct location

All testsuite stuff is now under ./tests. Consequently,
macro_pickup_tests.cmake should also be moved.
Testsuite: Update a comment
Testsuite: Also use '<>=,' as numdiff separators

This commit addresses issue #38: We have several tests in which numdiff
fails to recognize a number, because the output contains some unknown
delimiters, such as one of "<>=,".
Fix an outdated reference to fparser. Add a link.
More fixes with references that are now outdated.
Merge pull request #47 from tamiko/address_testsuite_issues

This pull_request addresses several minor issues with the testsuite:
Merge pull request #48 from bangerth/doc-fixes-5

Fix an outdated reference to fparser. Add a link.
Fix an instantiation.

The existing instantiation works, but is not in line with the actual
declaration of the function. This may or may not be the problem with
the failing tests here http://cdash.kyomu.43-1.org/viewTest.php?onlyfailed&buildid=10664
that result from a missing instantiation.
Merge pull request #49 from bangerth/fix-instantiation

Fix an instantiation.
fix wrong assert in notify_ready_to_unpack

The offset will always be >=4 because we store the CellStatus in the
data sent to p4est in front of the user data. This means the smallest
offset will 4, no matter how much data is attached.
add test
add documentation to register_data_attach
Merge pull request #51 from tjhei/fix_data_attach

fix, test, document Triangulation::register_data_attach

 * fix a bug in an assertion
 * add a test
 * document how the CellStatus in the callback function works
Implement new initialize method for Trilinos AMG preconditioner: It can be based on an Epetra_RowMatrix object. We can use this code path for the standard initialize method with TrilinosWrappers::SparseMatrix as well.
simplify doxygen input path
reduce warnings from thousands to hundreds as long as major code is undocumented
fix displayed include paths in doxygen output
fix some of the warnings
Improve the documentation for the new initialize methods.
Patch by Alexander Grayver: Fix face interpolation between FE_Nedelec elements.

This patch fixes a bug in the FE_Nedelec::get_face_interpolation_matrix related to the wrong indexing of the DoFs located on element faces. This patch ensures that the code produces an interpolation matrix with full column rank meaning that all DoFs of the FE with lower order are constrained.
Merge pull request #53 from bangerth/fix-nedelec-interpolation-matrix

Patch by Alexander Grayver: Fix face interpolation between FE_Nedelec elements.

This patch fixes a bug in the FE_Nedelec::get_face_interpolation_matrix related to the wrong indexing of the DoFs located on element faces. This patch ensures that the code produces an interpolation matrix with full column rank meaning that all DoFs of the FE with lower order are constrained.
Merge pull request #45 from guidokanschat/doxygen_cleanup

Some cleanup of doxygen issues:
simplify doxygen input path
reduce warnings from thousands to hundreds as long as major code is undocumented
fix displayed include paths in doxygen output
fix some of the warnings
Merge branch 'master' of https://github.com/dealii/dealii