Added degree distribution, size, and edge density
Merge branch 'master' into features
Merge branch 'master' into features

Conflicts:
	lib_graphd/inc/GraphProperties.h
Added features and working on gtests for them
fixing tree dependency
adding fun OpenMP things
add timings to count-tri
add another gettimeofday calculation
Added features: edge density, average degree, and degree distribution.
Also added gtests for these. Still need to comment the functions.
intermediate version of openmp testing
more openmp playing
Merge branch 'master' into openmp
Added documentation to the features, ran the GraphPropertiesTest through uncrustify
Changes in feature names now reflected in the gtests
Merging in changes from Jonathan
Make bin dir for tests if it doesn't exist;  fix makefile to rebuild if libgraphd.a changes
Merge branch 'master' into openmp
adding ORB sources for timer functions
adding shortest_path feature
merging upstream/master