Merge branch 'master' of https://git.code.sf.net/p/socialnetwork-abs/git
Add comments for drawGraph()
Add an uni-directional gragh in dyad
Merge branch 'master' of https://git.code.sf.net/p/socialarray/git
Improve updateTalk() in agent.py: Enable mutual talking behavior.
Fix a math problem in calculating the diagonal element in matrix person.PFactor
Add examples for quadriad.
Add an example for pentagram.