Added a $to variable in the sender.
Adds static function for headers encoding.
Merge branch '3.3/develop' into 3.3/feature/header-encoding

Conflicts:
	classes/Kohana/Mail/Sender.php
	classes/Kohana/Mail/Sender/Mail.php
	classes/Kohana/Mail/Sender/Mock.php
	classes/Kohana/Mail/Sender/PEAR.php
	classes/Kohana/Mail/Sender/PEAR/Mail.php
	classes/Kohana/Mail/Sender/PEAR/SMTP.php
	classes/Kohana/Mail/Sender/PEAR/Sendmail.php
	classes/Kohana/Mailer.php
	classes/Mail/Sender.php
	classes/Mail/Sender/Mail.php
	classes/Mail/Sender/Mock.php
	classes/Mail/Sender/PEAR.php
	classes/Mail/Sender/PEAR/Mail.php
	classes/Mail/Sender/PEAR/SMTP.php
	classes/Mail/Sender/PEAR/Sendmail.php
	classes/Mailer.php
Update README.md
Update README.md
Fixed most senders.
Merge branch '3.3/master' into 3.3/feature/header-encoding

Conflicts:
	README.md
Fixes headers encoding.
Fix tests for every supported senders.