2.3.a11: Split statoil grid test (#458)

Split test: test_grid_statoil split into 4 tests.

Add rms forward model

Merge pull request #450 from joakim-hove/unsmry-loader-file-flags

Add flag for ecl_file_open() of UNSMRY file

Dynamic summary load

Merge pull request #445 from stefoss23/load_egrid_without_actnum

WIP: ecl_grid can be allocated with int * instead of actnum_kw

Temporary disabled warnings-as-error

Version 2.3a7 could not be compiled because of -Werror, which is probalby too strict at the moment.
We will re-enable it as soon as all the warnings have been addressed

Refactored summary loader

Merge pull request #432 from joakim-hove/ecl-sum-data-refactor

Ecl sum data refactor

Utility functions to get summary var type

Merge pull request #415 from joakim-hove/summary-types

Summary types

Add numpy + pandas export from EclSum

Merge pull request #398 from pgdr/degrade-pandas

Require Pandas 0.17 instead of 0.20

Changed ecl mock signature

Merge pull request #384 from joakim-hove/mock-add-units

Add unit string to EclSummary testing

Added some C++ code

release/2018.04/rc2

Add ecl_sum function to get the last value.

2018.04/final

release/2018.04/final

Add ecl_sum function to get the last value.