this is just the result of
```
find -iname "*.[ch]pp" | xargs sed -i "s/ *$//"
find opm/parser/share/keywords -type f | xargs sed -i "s/ *$//"
```
so if it causes conflicts with other patches, the others should get
priority. The rationale behind this patch is that some people tell
their editor to remove white space which leads to larger than
necessary patches...
This entails:
- Adding a new data member of type Opm::Phase::PhaseEnum.
- Adding method getPreferredPhase().
- Adding extra constructor argument.
- Modifying constructor call in Schedule::addWell().
- Adding unit test for the new preferredPhase property.
- Modifying constructor call in all the well unit tests.
this is necessary because boost::gregorian::date does not have a
notion of "time during a day" which is required to specify time step
lengths less than a day...
