add variants of all methods which take a deck of the new parser to the well handling code

this is supposed to be a temporary work around for not requiring the
old parser. Most of this code can be removed after the new well
handling code has landed. (which might be still some time, alas.)
add variants of all methods which take a deck of the new parser to the EclipseWriter

this might need some additional patches as the current EclipseWriter
is taking advantage of quite a few features in EclipseGridParser, most
notably the getValue<T>() template method.
convert more exceptions to compile-time warnings with scary run-time statements

with this, norne runs up to the point where the initial solution is
written...
EclipseWriter: make it possible to write the Norne data

this requires that the PERM* are individually checked and that all
cells are always written. Also, there seems to be a problem with the
summary output which I have not investigated further...
use the raw*Rate() methods of the WconinjeWrapper

this implies that my 'hacks_for_norne' branch of opm-parser is used...