clusterPower 0.7.0

• Major update with empirical (simulation-based) power calculation for many new study designs
• Now two shiny apps included; see ?runExample

clusterPower 0.6.200

• Adding functions for difference in difference models
• Adding shiny app with runExample for GUI access to the package

clusterPower 0.6.1

• Adding functions for closed-form solutions to normal, count (Poisson), and dichotomous outcomes that mirror power.t.test, etc.
  
• Under the hood, documentation is migrated to Roxygen2, and all functions outside of base are explicitly called, via, e.g, stats::.
• Also, Nick Reich graciously transferring maintainership to Ken Kleinman.