The water/gas pressures are only calculated if woc and goc lies within
the reservoar
The water/gas pressure is set to -inf when woc and goc is above or below
the reservoar.
Fixes issues pointed out in the PR comments
FindQuadmath: add -fext-numeric-literals if the compiler supports it

this is required for GCC >= 4.8 to support the 'Q' suffix for floating
point literals (which are used in the quadmath.h header)

In order to prevent compilers which eat the flag but do not support it
from complaining constantly, it is tested for with "-Werror" enabled...
Remove unnecessary grid from fluid test.
Make all construction from deck use EclipseGrid.

The deck constructor is still present, but it will construct an
EclipseGrid object instead of doing its own equivalent processing.
Add PINCH support to grid construction.
Create pointer-to-const objects.

Older gcc (4.4) does not allow conversion of shared_ptr<Foo> to
shared_ptr<const Foo>. Pointed out by @bska.
Provide eclipse state to saturation property init.
Use new constructor for EclipseGrid.
Merge pull request #633 from atgeirr/use-pinch

Unify grid construction, allow PINCH
Merge pull request #634 from osae/satFunc-eclState

Provide eclipse state to saturation property init.
CornerpointChopper::writeGrdecl(): Write fewer items per line

This is in preparation of increasing the vector output precision to
reduce the impact of rounding errors in subsequent upscaling.  The
change impacts floating-point vectors only.

Background: The ECL simulator stipulates an upper bound on the
number of characters in a record (i.e., one line) and while we don't
have such limits, there's no reason to emit lines that can't be
input by other tools.
CornerpointChopper::writeGrdecl(): Increase vector precision

This commit increases the precision of the (floating-point) vector
output (e.g., permeabilities) from method writeGrdecl().  This
reduces the impact of rounding errors when the sub-set sample is
output to disk for subsequent processing (e.g., property upscaling).
Merge pull request #632 from bska/cpchop-precision

Increase precision from CornerpointChopper::writeGrdecl
Merge pull request #630 from totto82/fix_init_spe9

The water/gas press. are calculated only if woc/goc is within the reservoar
Merge pull request #631 from andlaus/add_-fext-numeric-literals

FindQuadmath: add -fext-numeric-literals if the compiler supports it