QUAD: changed type to enum class, containing S and Q so far
QUAD: enum class for quadrature types as well..

QUAD: enum class for quadrature types as well.. now fix mpi as well

QUAD: enum class for quadrature types as well.. now fix mpi as well, no, really

QUAD: enum class for quadrature types as well.. now fix mpi as well, no, really (damnit, WIP)
QUAD: uniform -> Uniform
Merge branch 'integrate/roberts-pr-69' into development

This merges Robert's first PR (#69). I've squashed a few commits into
one (6ef96566) on his request.

* integrate/roberts-pr-69:
QUAD: uniform -> Uniform
QUAD: enum class for quadrature types as well..
QUAD: changed type to enum class, containing S and Q so far

Signed-off-by: Torbjörn Klatt <t.klatt@fz-juelich.de>