Created repoPrefix() for use in makeRepo() and unit tests
Added unit tests for makeRepo() for source, win.binary and mac.binary
Updated README.md
Run tests on R CMD check with testthat and skip_on_cran()
Add ability to include github packages. #9
Updated tests with skip_on_cran()
Fixed placement of legend in example
Removed filters from available.packages() to return all packages, regardless of machine R version. #12
Deal with case where rownames are not identical to package names
Refer to github.com/RevoluionAnalytics/checkpoint. Closes #13
Rebuilt vignette