docu: a few tweaks towards better Doxygen usage

mainly subpaging the few existing docu pages
Merge pull request #30 from torbjoernk/feature/shared-ptrs

some C++11-fications and technical tweaks
Merge pull request #34 from torbjoernk/feature/docu-tweaks

docu: a few tweaks towards better Doxygen usage
advection_diffusion: Add 'as_dvector' and use references.

This shortens up a bunch of code and is (hopefully) easier for newcomers
to read.

Signed-off-by: Matthew Emmett <memmett@gmail.com>
Silence a bunch of compiler warnings.

Signed-off-by: Matthew Emmett <memmett@gmail.com>
quadrature: Put zeros in interp matrix where appropriate.

This fixes the MLSDC examples.  Guess how long that took to track down?

Signed-off-by: Matthew Emmett <memmett@gmail.com>
Merge pull request #36 from memmett/feature/fix-interp

Fix interpolation matrix.
Merge branch 'release/v0.1.0' into feature/by-reference
vector: Move as_vector to vector.hpp as suggested by Ruprecht.

This also overrides for the const case, as suggested by Klatt.

Signed-off-by: Matthew Emmett <memmett@gmail.com>
Merge pull request #35 from memmett/feature/by-reference

Go back to using references in AdvectionDiffusionSweeper.
Merge branch 'release/v0.1.0' into feature/sdc-factory

Conflicts:
	examples/advection_diffusion/advection_diffusion_sweeper.hpp