Fixes #29

* attempt to get hyperlinks recognized

* Roxygen update

with encoding specification to avoid note during CRAN check

* md produced from re-reunning the Rmd

* Take rendered md back to master

* Re-render README, but hold on to the pre-existing TOC

* Insert newline

cc @dmi3kno

Hopefully will improve rendered README that CRAN displays, in future.

closes #19

cc @labarba

Minor change to man page for data(gapminder)