Rewrite and unify operator application for linear and linearized problems
This is the already advanced merge request related to the issue #2 (closed).
A detailed explanation for this cleanup can be found therein.
All the TODO notes so far have been checked off.
In the nonlinear local operators the isLinear
flag has been explicitly set to false
.
The unit test for the numerical jacobian-apply methods has been adapted to this new interface. The unit test for the local operator interface has been extended to call it on all grid operator variants.