misc. improvements to {Array,common}.hpp, add 'pragma once' to FileIO
add SmallLocalSet impl
add 'min_element' helpers
working on Graphlab graph creation, implemented 'greedy_oblivious' edge scatter
add graphlab-test
scatter edges, sort them, build vertex info on each core
Collectives: add 'sum_all_cores'
allow array_str() on anything that supports range-based for
GlobalHashMap::insert_async that takes arbitrary lambda (so we can, for instance, insert into a CoreSet value
add master/mirror data to Graphlab::Graph