hadley/devtools — pull request #135 by wch (2012-08-11 19:13:21+00:00)
Title: Miscellaneous fixes

This is a grab bag of fixes to make devtools work better with the namespace system:

* `loaded_packages()`: lists names of packages that are loaded and attached.
* `parse_ns_file()`: parses the NAMESPACE file for a package.
* imports and export information from NAMESPACE file is now stored in the namespace metadata.
* `unload()` now forces unloading of namespaces that won't unload the normal way. This includes, for example, namespaces that are imported by devtools (like `httr`).