Allow defining multiple bounding boxes per MPI rank #180
Description
Currently the Micro Manager accepts the macro domain bounds, and based on the available number of ranks, partitions the macro domain into bounding boxes which are then used to access mesh regions in preCICE. With the upcoming capability of preCICE to define multiple bounding boxes per rank, the Micro Manager could offer a way for the user to define mutliple bounding boxes per rank. How the user configures multiple bounding boxes per rank would need to be figured out. Either the user could directly give the bounds of each box per rank, or potentially tell the Micro Manager where the boxes need to be, and let the Micro Manager calculate the bounds.
Allowing multiple bounding boxes per rank could potentially make local adaptivity much more powerful than it is now.