Indentation change
Merge branch 'master' of github.com:snap-stanford/snap

Merging.
minor changes in the documentation comments
resolved TODO documentation tasks in graph.h and network.h
minor documentation edit
minor documentation edits
minor documentation edits
minor document edits
Small changes for multithreading flows example.
minor documentation edits
minor documentation edits
updated RELEASE.txt for Snap 2.2
added cesna, coda to Makefile, fixed compilation warnings in agmattr.cpp, agmattr.h, agmdirected.cpp
fixed compilation warnings on Cygwin
fixed compilation errors for coda on OS X with g++-4.2
fixed compilation problems for Snap.py in shash.h
small changes to examples file
Merge remote-tracking branch 'upstream/master'
Cleaned up unused functions/files for flows. Added a small test. Cleaned
up comments.