Added Poisson and Binomial distribution fitting along with gtests and sections in graph_stats
Merge branch 'master' into features

Conflicts:
	lib_graphd/src/GraphProperties.cpp
	util/src/graph_stats.cpp
Merge remote branch 'upstream/master'
Merge remote branch 'upstream/master'
Added continuous power law distribution fitting and made adjustments to
existing distribution fitting methods, fixed small errors.
Included the continuous power law into graph_stats and created gtests for it.
Merge remote branch 'upstream/master' into test_merge

Conflicts:
	util/src/graph_stats.cpp
Added diamter, effective diameter, and the distribution fitting functions to
graph_stats. Also fixed some issues with delta hyperbolicity, though there
is currently no guarantee that it is completely working.
Merge remote branch 'upstream/master'
Minor change to graph_stats, put diameter and effective diameter after
the shortest_paths calls
Merge pull request #33 from jdlschrock/master

Additional degree distributions, diameter in graph_stats