this fixes the problem that well totals are off by a factor of
two. Note that the better solution would be to continue to write once
per substep but skipping report step writes if the adaptive time
stepper is used. since I've got no idea how to find this out I propose
this patch.
this enables to build opm-output using an unpatched `dunecontrol` from
Dune 2.3 (and Dune 2.4 if USE_CMAKE is set to "no").
In the medium term the build system needs to become compatible with
Dune's cmake based build system since I think I read somewhere that
the Dune devs intend to remove the autotools based build system before
their next release.
Borrows macros and common infrastructure from the rest of the opm
project instead of half-implementing its own (as parser must do).
Largely a build system simplification.
