Add service hook for Distiller

Distiller is a Continuous Integration and Deployment service for iOS.

http://distiller.io
Add Distiller help text
Update Distiller hook to use HttpPost as parent class
Specify webhook.secret as a password
Merge pull request #840 from github/webhook-secret-is-a-password

Specify webhook config 'secret' as a password
remove duplicated titles from config documentation
Remove more H1's from service docs
Merge pull request #842 from github/fixup-install-docs

Fixup install docs
Turns off Amazon SNS test which relies on valid AWS creds

Hopefully we can get some valid creds in here sometime to turn this back
on. Or, figure out a way to test this in isolation.
Merge pull request #843 from github/turn-off-failing-amazon-sns-test

Turns off Amazon SNS test which relies on valid AWS creds
Update Jira to JIRA
Uppercase the JIRA service class name
This is the quickest way to ensure that the service title appears as JIRA as opposed to Jira in services.json... and the dropdown list of services on GitHub.com
Prefer JIRA over Jira
Fixing typeo and bug in static file selector.
Use Travis CI as title for the service.
Add maintainer and support for Travis CI.
Merge pull request #844 from github/jira-fix

Minor documentation fix for JIRA service
Merge pull request #845 from travis-ci/mm-change-travis-ci-title

Update Travis CI title, contact information
loosen pushbullet api restriction, fixes #846
Add DjangoPackages Service.