Update README.md

Fix readme
Merge pull request #61 from iroller/patch-2

Update README.md
Upgrade rails 4.1.0 to 4.1.5 for CVE-2014-3514
Don't forget to commit deleted vendor gems
Merge pull request #62 from zendesk/pobrien/rails_upgrade

Rails upgrade to address CVE-2014-3514 (activerecord create_with vulnerability)
Merge branch 'master' into pswadi/add-stop-n-approve
dont allow viewers to see the redeploy button
Correct use of samson roles
use upstream sawyer now that fix is merged
not sure why this changed itself
bump sawyer, pr got merged
Merge pull request #65 from zendesk/grosser/sawyer

bump sawyer, pr got merged
One more shellescape required
Merge pull request #68 from zendesk/pobrien/sec_fixes_1_1

One more shellescape required
more conservative Gemfile
Merge branch 'master' into roman/viewers_cant_redeploy

Conflicts:
	Gemfile.lock
Merge pull request #64 from zendesk/roman/viewers_cant_redeploy

dont allow viewers to see the redeploy button
Merge branch 'master' into pswadi/add-stop-n-approve
Let other deployer stop the deploy, only if it is waiting for approval.