return latest prerelease version if there are no release versions available
Merge pull request #706 from knappe/master

Update ruby version to 2.0.0-p481.
use database_rewinder instead of database_cleaner
Update versions for rubygem and ruby.
Drop distinction between mysql and mysql2

The `mysql` gem has been deprecated in favor of the `mysql2` gem.  At this point, we shouldn't make a distinction and just point people to the `mysql2` gem.

This also removes a warning about MySQL in Snow Leopard, which included a typo that has been there for about a year.  Given the length of time the typo existed, I would say we're in the clear to remove the entire warning.
Merge pull request #707 from knappe/patch-2

Update versions of rubygem and ruby.
Merge pull request #708 from knappe/patch-3

Drop distinction between mysql and mysql2
Merge pull request #709 from mcfiredrill/database-rewinder

use database_rewinder instead of database_cleaner
Hide yanked gems on author's profile.

Fixes #677
Merge pull request #705 from Elffers/yanked

Hide yanked gems on author's profile.
add Runscope sponsor link
Updated Runscope logo for the sponsors section of the rubygem.org website.
Adds transparency to the Runscope logo to match current sponsors logos.
Merge pull request #711 from mginnard/updated-runscope-logo

Updated runscope logo for rubygems.org
send deploy notification to #rubygems
Update tzinfo to version 0.3.41
Do some error checking better in permadelete
It's compact, not flatten. der.
Update pry to version 0.10.1
Update delayed_job_active_record to version 4.0.2