Comment out Gittip link on gem pages

We don't yet have the landing pages on the Gittip side needed to support
the level of indirection to show Gittip accounts associated with a Ruby
gem:

    https://github.com/gittip/www.gittip.com/issues/1591

This comments out the link from gem pages for now. The link from
profile pages on Rubygems to Gittip is fine.
Update factory_girl_rails dependency to version 4.3.0
Update unicorn dependency to version 4.7.0
Update shoulda-context dependency to version 1.1.6
Fix VersionsController tests
Update librato-rack dependency to version 0.4.4
Update cucumber dependency to version 1.3.9
Update redis dependency to version 3.0.6
Update newrelic_rpm dependency to version 3.6.9.171
Update diff-lcs dependency to version 1.2.5
Update pry dependency to version 0.9.12.3
ruby_version is saved in versions
Issue #617 Ruby Dependency on rubygem show page
add ruby version unit tests
Update launchy dependency to version 2.4.0
Speed up the dashboard feature test

I can't think of a very good reason to call `visit` 2,009 times for this
test. Changing these to more sane numbers took this test from ~8 seconds
to 0.5 seconds.

If this spec was trying to test the formatting of the numbers on the
dashboard then a view spec would much more simply and efficiently cover
that. I don't think that's a particularly valuable test so I didn't
implement it here.
Merge pull request #623 from derekprior/dp-faster-dashboard-feature

Speed up the dashboard feature test
Update slop dependency to version 3.4.7
Update cucumber dependency to version 1.3.10
Switch password strategy to BCryptMigrationFromSHA1.