Scaling of relperm functions - oil/water systems.

opm/core/eclipse/EclipseGridParser.cpp
opm/core/eclipse/EclipseGridParser.hpp
- New keywords: ENDSCALE SCALECRS SWCR SWL SWU SOWCR KRW KRWR KRO KRORW

opm/core/eclipse/SpecialEclipseFields.hpp
- Parsers for ENDSCALE and SCALECRS.

opm/core/fluid/BlackoilPropertiesFromDeck.cpp
- Consistency check: ENDSCALE implemented for SatFuncSimple only.

opm/core/fluid/SatFuncGwseg.hpp
opm/core/fluid/SatFuncSimple.hpp
opm/core/fluid/SatFuncStone2.hpp
- Accomodate "default" values for scalable parameters.
- For SatFuncGwseg and SatFuncStone2 the associated functionality not
  yet supported and the variables are dummies to satisfy the compiler.

opm/core/fluid/SatFuncSimple.cpp
- Initialisation for scalable parameters.
- Evaluation of relperms: Use (1-so) for evaluation of oil-relperms.
  (For scaled arguments sw and so do not necessarily add to one.)
- TODO: SatFuncGwseg.cpp and SatFuncStone2.cpp for oil-water systems.

opm/core/fluid/SaturationPropsFromDeck.hpp
- Struct to accomodate cell-wise scaling factors.
- Two flags indicating scaling and method.
- Methods for parameter initialisation and scaled relperm computation.

opm/core/fluid/SaturationPropsFromDeck_impl.hpp
- Initialize scaling options and relevant cell-wise scaling factors.
- Relperm evaluation modified for possible end point scaling.
Removed tabs.
Fixed loop index and added parameter check.
Loop index.
Support for keywords ENPTVD and ENKRVD.
Merge pull request #103 from osae/endscale

Scaling of relperm functions - oil/water systems.
Merge pull request #109 from atgeirr/dg-improvements

DG time-of-flight improvements
Merge pull request #110 from atgeirr/dg-improvements

Improvements for time-of-flight and tracer computations
Added MinUpwindAverage limiter method, made it default.
Merge branch 'master' into dg-improvements