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 pry dependency to version 0.9.12.4
Update mime-type dependency to version 1.25.1
Update capybara dependency to version 2.2.0
Update launchy dependency to version 2.4.1
Update launchy dependency to version 2.4.2
Update clearance dependency to version 1.1.0
Update timecop dependency to version 0.7.0
Bump to 2.1.11

The version on the front page hasn’t matched the release version in nearly 3 months, this corrects that.
Merge pull request #629 from amarshall/patch-1

Bump to 2.1.11
Update rails dependency to version 3.2.16
Update i18n dependency to version 0.6.9
Update puma dependency to version 2.7.0
Update geminabox url
Merge pull request #631 from elgalu/patch-1

Update geminabox url
Update newrelic_rpm dependency to version 3.7.0.177
Update puma dependency to version 2.7.1
Remove today counters and graphs
Downgrade fog and excon to fix S3 communication issues
Merge branch 'master' of github.com:rubygems/rubygems.org