Adding Andrew's refactoring of haid_plot to the repo.  Also added first draft documentation for haid_plot.  Finally, this is a first try at branching and merging.
Added mapvisuals.R so we can manage the Rosxygen2 creation of NAMESPACE. Doing so also added mapvisuals.Rd to /man.  Updated NAMESPACE.
Merge pull request #2 from chrishaid/haid_plot

Haid plot