adds IrcNotifier class
fixes suggestions from PR
removes setServer and setPort
changes order of parameters in constructor for easier usage, updates examples in docblock accordingly
uses sprintf for all sendData commands
removes PHPDOC on private methods
feature #109 adds IrcNotifier class (bshaffer)

This PR was merged into the master branch.

Discussion
----------

adds IrcNotifier class

Usage:

```php
$ircNotifier = new Sismo\Contrib\IrcNotifier('irc.freenode.com', '6667', 'sismo-bot', '#mychannel');
```

Commits
-------

97353ac removes PHPDOC on private methods
1059b29 uses sprintf for all sendData commands
d1d15f5 changes order of parameters in constructor for easier usage, updates examples in docblock accordingly
38a39fb removes setServer and setPort
2771621 fixes suggestions from PR
ba83a30 adds IrcNotifier class
Cleaned previous merge