Create usingthedata

How to analyze Cal-Access campaign finance data, plus dos and don'ts.
Update usingthedata
Rename usingthedata to usingthedata.dst
Rename usingthedata.dst to usingthedata.rst
Update usingthedata.rst
Update usingthedata.rst
Update usingthedata.rst
Update usingthedata.rst
Merge branch 'docs-forreal'