Create Version 2 of the Humbug Hook Payload, Rename Humbug->Zulip

This adds additional fields to help users customize where their github
traffic ends up, and helps filter the traffic for particularly noisy
repositories.

This also rebrands the Humbug hook as Zulip, to reflect the change
in Company name.
Revise Zulip documentation
Update Trac instructions. Fix #794.

This commit doesn't touch trac.rb to avoid breaking existing installations of http://github.com/davglass/github-trac. trac-github is recommended for new installations.
Fixup Humbug/Zulip unit test
Clarify that the Trac service is deprecated
Merge pull request #797 from anna239/master

add ability to disable processing of not distinct commits
allow multiple tokens for different OBS builds

Use a comma separated list of tokens and send several http post requests.

Signed-off-by: Arun Persaud <arun@nubati.net>
add test case for multi token OBS notification
Merge pull request #798 from adrianschroeter/master

Multi-Token notification support for OBS
First commit
Webhook is a non-proper noun.
Merge pull request #795 from aaugustin/master

Update Trac instructions. Fix #794.
set the correct class name
changed some URLs
minor URL edits
Create service for Pushbullet.
Added documentation for Pushbullet.
Trim trailing whitespace.
Add test for Pushbullet service.
Use helpers