Closure Rules v0.2.4

This release contains some bug fixes and features that will be important for users running development web servers from Bazel, or generating deps files for raw sources mode. Some of the changes are explained in-depth in #111. The documentation has also been updated to clarify rule polymorphism.

• Fix bug in closure_js_deps bug with external paths b5bb87e
• Implement the correct behavior for runfiles and add data attributes a59f290
• Don't download large tarballs for other platforms unless necessary 577cee9
• Recommend http_archive rather than git_repository for installation 0e3eade