Rudimentary Support for Finite Element Operations on SAMR Meshes

The Algorithm package contains some basic functionality for summing node and edge data quantities at shared points between neighboring patches. Such operations are commonly found in finite element computations. For example, when applying finite element integration that take contributions from each element to a node or edge, one can divide the problem into patches, do operations on each patch, and then accumulate the neighboring patch contributions by employing a patch boundary node or edge sum. These classes are partitioned into two categories:

1. operations applicable when all simulation data live on all patches on the patch levels involved
2. operations applicable when simulation data live on subsets of patches on the patch levels involved, so-called 'locally-active' data

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