Document commit change notifications
Change notifer commit change environment variables

DELIVER_CHANGES     -> HEAVEN_NOTIFIER_DISPLAY_COMMITS
COMMIT_CHANGE_LIMIT -> HEAVEN_NOTIFIER_DISPLAY_COMMITS_LIMIT
Check for the correct flowdock env variable.
Merge pull request #116 from jacortinas/flowdock-notifier-env-check

Check for the correct flowdock env variable.
latest cve
Merge pull request #117 from atmos/CVE-2014-7829

Address CVE-2014-7829
Merge pull request #114 from dblandin/update-commit-change-environment-variables

Change notifer commit change environment variables
Merge pull request #109 from dblandin/document-commit-changes

Document commit change notifications
Don't use the top-level keys, use newer nested ones
Merge pull request #120 from ZeroFucks/top-level-payload-keys

Don't use the top-level keys, use newer nested ones
Refactor request specs and spec helpers
Move GitHub source validation to separate file
Use rails params instead of passing along json string
Expect a hash instead of a JSON string everywhere
Fix pending deployment request spec
Use :not_found instead of 404
Move specs into more intuitive locations, matching app hierarchy
Remove trailing commas from status fixtures
Fix up the Receiver specs
Move Gist and DeploymentStatus helpers to helpers directory