Merge pull request #1 from girishsk/master

First go at the Cube building
Merge pull request #2 from girishsk/master

Full Cube building.
Merge pull request #3 from girishsk/master

Changed the ward grouping to Community area grouping
Merge pull request #4 from girishsk/master

RCode for doing some analysis
R script for example in paper
moved pipes, to match flow diagram
OmniGraffle flow diagrams
adding flow.dot diagram
Adding Exponential Decay