Add cylinder manifold

[mivaia]

Description

• Added cylindrical manifold option to manifolds.cc.
• Modified the parameter file input (arg1, arg2, ... arg6 became point coordinates and vector coordinates).
• Added a some documentation to explain how the manifold subsection works.

Coarsest meshes were too coarse and lead to geometrical errors even when refined. A manifold makes it possible for the refinements to follow a particular geometry.

Testing

New 3D application test using a cylinder manifold.

Documentation

Modified existing simulation parameters which were unclear. Manifolds can now be described with a center point (spherical/cylindrical) and a direction vector (cylindrical)

Checklist (will be removed when merged)

See this page for more information about the pull request process. Code related list:

• [x] All in-code documentation related to this PR is up to date (Doxygen format)
• [x] Lethe documentation is up to date
• [x] New feature has unit test(s) (preferred) or application test(s)
• [x] The branch is rebased onto master
• [x] Changelog (CHANGELOG.md) is up to date
• [x] Code is indented with indent-all and .prm files (examples and tests) with prm-indent

Pull request related list:

• [x] Labels are applied
• [x] There are at least 2 reviewers (or 1 if small feature) excluding the responsible for the merge
• [x] If this PR closes an issue or is related to a project, it is linked in the "Projects" or "Development" section
• [x] If the fix is temporary, an issue is opened
• [ ] The PR description is cleaned and ready for merge

[blaisb]

@mivaia your test is failing on deal.II 9.5 because of a path issue. For an easy fix, make your test run with mpirun=2 by adding correct prefix to your output file. This should fix your issue with 9.5 :)