Completes styling of sponsor list in the footer
Allow fully-yanked gems to be unyanked by the original owner

This still allows for a new user to swoop in and claim the gem by pushing their own version. Doing so would delete the previous ownership.
Refactor to yank a version directly rather than through its gem
Patch existing find_or_initialize_version_from_spec to make size an optional parameter.
size_in_kilobytes -> number_to_human_size
Change to cleaner syntax.
Add size to versions.
brought Chris's patch up to date and added a script to calculate sizes for existing gems
cleaned up Version#size interface
smoothed out size interfaces in Pusher and Rubygem
Add atom link for single gem versions feed

Add atom builder for single gem version

Add styles for rss link

Add yield head for injecting atom feed link

Include link tag in head for rss feed

Add gem name to feed title, add test for atom feed

Use ruby stdlib iso8601 method instead of hand formatted

Refactor individual and all versions feeds to share some builder partial
Display licenses for gem versions.
Merge pull request #458 from pivotalforks/add_license_to_versions

Added license information to versions.
Update librato-rails dependency to version 0.8.0
Update dalli dependency to version 2.5.0
Lock capybara dependency to version 1.1
Lock delayed_job dependency to version 3.0.3
Update newrelic_rpm dependency to version 3.5.2.17
Update rake dependency to version 10.0.1
Update excon dependency to version 0.16.10