v0.0.5

Version to 0.0.5; layout_set() renamed to layout()

v0.0.4: Validate list of dependencies prior to constructing package_map (#57)

* :sparkles: added assert_valid_dependencies to improve handling of CSS deps

* :bug: fixed issue with displaying messages

* :hammer: allow affixing version to stylesheet tag

* :rotating_light: check for dependency formatting and supply useful error msg

* :beetle: fix code regression disallowing remotely hosted JS

* :black_nib: rename assert_valid_dependencies to clean_dependencies

* :bug: wrap is.null in parentheses

* :bug: fix serving local deps when hrefs are also present