Updates to various places of the documentation.
Adjust based on Guido's feedback.
Made MappingQ compatible with Manifold.
Merge pull request #164 from bangerth/doc-fixes-8

Updates to the documentation of the quadrature formulas.
Merge pull request #154 from luca-heltai/mappingq_manifold

Made MappingQ aware of Manifold
Fix TrilinosWrappers::SparseMatrix::add(factor, other_matrix).
Merge pull request #168 from kronbichler/master

Fix TrilinosWrappers::SparseMatrix::add(factor, other_matrix).
Remove stray Id tag from svn from all headers
Merge pull request #169 from kronbichler/master

Remove stray Id tag from svn from all headers