Block8/PHPCI — pull request #440 by Ange7 (2014-05-21 12:17:44+00:00)
Title: Add new XMPP Notification plugin

Add new XMPP notification plugin of successful / failure build.

example configuration :

```
complete:
xmpp:
recipients:
- "recipient1@jabber.org"
- "recipient2@jabber.org"
tls: true
username: "yourxmppaccount@server.com"
password: "password"
```

Use «server» param name to define another server :

```
complete:
xmpp:
recipients:
- "recipient1@jabber.org"
- "recipient2@jabber.org"
tls: true
username: "yourxmppaccount@server.com"
password: "password"
server: "gtalk.google.com"
```

Use «alias» to define one pseudo

Use «date_format» to define date format (strftime)