Adds Divshot.io as a deploy provider.
Adds Divshot.io to README
Adds a few specs for Divshot provider.
Merge remote-tracking branch 'divshot/divshot-io'

Conflicts:
	README.md
Fix Travis Build Link
Merge pull request #66 from Joshua-Anderson/travislink-fix

Fix Travis CI link in readme
Make JRuby an allowed failure

Until I can figure out why Rake is reporting that rspec failed,
I'm going to leave JRuby as an allowed failure so that we have
a passing build
Add Rackspace Cloud Files provider.