Log Message:
Update rubyforge to version 4.5.0.  Changes from version 0.4.2 include:

+ Install as a Ruby gem.

* Update for Ruby 1.9.0.
* New type_id values will merge with extant data. (self-repairing data is Good)
* Scrape processor_ids, merging in with extant data.
* Default to "Other" if a file's type is unrecognized.
* Set mode on .rubyforge directory to 700.
* Fix fetching of user id when user has no releases.