rappdirs 0.3
============
* first CRAN release
* xxx_dir() functions only use version when appname is not null
* docs: basic package docs (?rappdirs)
* docs: clarify primary purpose of os argument in xxx_dir() i.e. testing
* fix typo in function name in README.md (app_dirs -> app_dir)
* dev: add travis continuous integration
* dev: add rstudio project
* dev: update to roxygen2 v4.0.1
