Update Rack::Cache URLs
security update note
Allow fallback to legacy urls to be turned off
Merge pull request #257 from fcheung/optional_legacy_urls

Allow fallback to legacy urls to be turned off
source :rubygems => https://rubygems.org
Back to Rack::Utils to escape urls, but keeping URI.unescape means that '+' characters won't get changed to spaces as per https://github.com/markevans/dragonfly/issues/249
Fixed erb indentation in README
Merge pull request #259 from jvrmaia/master

Change source from :rubygems to https://rubygems.org
Merge pull request #268 from parndt/patch-1

Fixed erb indentation in README
Merge pull request #208 from jordelver/fix-rack-cache-urls

Update Rack::Cache URLs
Correct Heroku doc regarding Varnish

Varnish is no longer part of Heroku's platform, be it Bamboo or Cedar.

Heroku removed Varnish from the Bamboo stack in Jan 2013:
https://devcenter.heroku.com/changelog-items/201
Merge pull request #270 from DynamoMTL/heroku-doc-fix

Correct Heroku doc regarding Varnish
removed jeweler
Added :check_malicious option (off by default) to serializer
Check for malicious strings when deserializing job
readme tweak
history for 0.9.15
0.9.14 -> 0.9.15 in doc
version bump
Yard setup uses new version file