adding vectormap class
adding vectormap to build system
insert member
initial vectormap<> implementation
add a .count() member, update documentation
refactor metis to use vectormap
invoke METIS only on processor 0, then broadcast the partitioning
change the vectormap<> to be from id to id rather than ptr to id, in order to save space on 64-bit machines with 32-bit indices
adding vectormap unit tests
test iterating
standalone header