Add install_test_deps task
Add abs_latest to combine latest and prerelease
Add ability to filter NameTuples before fetching specs
Reuse the original protocol in api_uri
Alias readpartial from read to make Zlib happy
Fix api_uri test to mock real DNS response
Sort the directory entries for predictable output
Don't prompt about removing executables
Add Gem::Util::popen for ruby 1.8.7

IO.popen on ruby 1.8.7 does not support array-style arguments which are
needed to avoid perilous escaping in Kernel#`.

This implements IO.popen using exec which supports array-style
arguments.
Add git gem source

This is part of implementing git gems in rubygems.  This class manages
a repository for a git gem.

This class is incomplete, it doesn't manage updating existing git gems
yet, and doesn't manage multiple revisions properly (I'm guessing).
Add Gem::DependencyResolver::GitSet

The GitSet will contain git gems for use by the resolver.  I'm unsure if
creating the source here is correct or not.  This will require further
work as I continue integrating git gems into the resolver.
Add initial support for git gems in gem.deps.rb

Currently this only supports gems with a revision of HEAD.  Such gems
probably can't be installed by the resolver.
Update MIT credits for near-identical bundler code

Parts of Gem::Source::Git mirror Bundler::Source::Git and
Bundler::Source::Git::GitProxy.
Normalize URI for ruby 1.8

Ruby 1.8.7 does not downcase the URI scheme like 1.9+, so do it by hand.
Add support for branch option in git gems
Simplify test_gem_git

There's no reason to try to create or load git gems.
Use master as the default git gem reference

This matches bundler behavior.
Remove default reference argument

This should be given by all callers and only defaulted in a gem.deps.rb.
Add git gem tag support
Implement git gem ref support