Docstrings, renamed a generic unnamespaced function

Many of us use describe-function to figure out how to use a package, so docstrings are nice to provide. read-url is not namespaced, and is far too generic a name for what it does, renamed to something less likely to clash with other packages.
Merge pull request #5 from noisesmith/patch-1

Docstrings, renamed a generic unnamespaced function