Switch twitter_ebooks with 2.3.2 instead of 9999

As I just found out, twitter_ebooks does actually have released
versions, they just only happen to be on the rubygems page for some
reason. Trying to get 9999 working is more of a pain then it's worth,
and it's best to avoid 9999 ebuilds when possible anyway.
dev-ruby: remove SRC_URI from ebuilds

Apparently this isn't needed for ruby ebuilds, since they'll just try to
grab the gem on their own anyway.
Add ebuild for dev-ruby/cookie-jar
Add ebuild for dev-ruby/em-http-request
Add ebuild for dev-ruby/em-socksify
Add ebuild for dev-ruby/em-twitter
Add ebuild for dev-ruby/faraday

The one in portage for 0.8.8 is kind of broken, so we need our own
Add ebuild for dev-ruby/tweetstream
dev-ruby/gingerice: Correct dependencies