The getKeyword() method will autocreate and initialize a keyword if you
ask for one which is supported, but has not yet been accessed. The new
getInitializedkeyword() method will raise an exception if the keyword
has not already been initialized.
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 fixes a really ugly and hard to find bug if EclipseState was
instanced multiple times: The EclipseState object passed to some of
these structures was destroyed, but the arrays stayed even if the next
EclipseState object was at a different location and also could use a
completely different grid...
this uses a small amount of template magic, to automatically change
the API of the GridProperty class depending on wheter it is
instantiated for double or for int.
