3d plot colored per event
Adding section on how to clean up data in a column
Completed documenting health indicators scatter.

Completed the description of the data wrangling process, going form the NY
State indicators raw data, up to distilling the two parameters that we are
going to compare in the scatter plot.
Minor retouch of text.

Improving the use of headers.
starting the histogram section

Includes beginning rough introduction to using binary vectors as selectors
Merge remote-tracking branch 'refs/remotes/origin/datavis' into datavis
improved color scheme
fixed up plots and explanations
Merge branch 'datavis' of https://github.com/SUNY-Albany-CCI/bc into datavis
built markdown