Add RolX to snap-adv. Add egonet to subgraph
Clean up unused files
Add comments, clean up codes
Add README on Enron dataset
change example
README
a typo
add design consideration in README
Modify comments
Merge branch 'master' of github.com:Cobra-Kao/snap

Conflicts:
	snap-adv/rolx.h
Rename main function to testrolx.cpp
change the testrolx.cpp
readme
small change
Merge remote branch 'upstream/master'