this fixes some annoying inconsistencies (e.g., the recently
introduced 'dyne' unit was unavailable in the opm-core version) and
gets rid of some compiler abiguity errors if 'using namespace
Opm::details' was used by code inside the 'Opm' namespace.
Since opm-parser is a hard dependency of opm-core, the only measure
which must be taken by higher-level code is to include
'opm/parser/eclipse/Units/Units.hpp' instead of
'opm/parser/eclipse/Units/ConversionFactors.hpp' or
'opm/core/utility/Units.hpp'.
Note that a potentially better location for this code would be
opm-common, but this would break the Windows build of opm-parser.
dynamicstate.get returns a const reference rather than a by-value copy,
in order to be consistent with other container classes.
This introduces a problem for std::vector<bool> with its specialisation,
so all DynamicState<bool> instances has been replaced by
DynamicState<int> and explicit bool conversions.
This is an effort to improve build performance. Several includes
scattered across the project are either unused or partially used (i.e.
just used to import a type name, not depending on the actual contents of
the header file).
Replaces a lot of these includes with forward declarations.
