Mail_Queue as Iterator.
Added tests for queue.
Fixed Queue_File.
All headers are encoded in Model_Mail.
Added useful headers alias such as bcc, cc, and reply_to.
Added extensive documentation.
Merge branch 'develop' into test

Conflicts:
	classes/kohana/model/mail.php
Added a to() function in Model_Mail.
Using to() in Sendmail and imap senders.
Fixes to() function.
Added $output_format in headers_encode.
Fixes to() function.
Added $output_format in headers_encode.
Only use headers_encode for subject.
Encode non-ascii headers.
Encode if non-ascii.
Merge branch 'develop' of github.com:Hete/kohana-mail into develop

Conflicts:
	classes/kohana/model/mail.php
Zero or more for ascii matching.
Added some tests.
Fix for ascii detection.
Remove from_name and from_email from configuration, it is much better to use headers array.
Merge commit '55bc70bf5f6b77e3d35412bb58ee0386ab496324' into develop

Conflicts:
	classes/kohana/model/mail.php
Finished headers_encode. Now support name <email> format with recursive encoding.
Added some tests.
_send is protected, but send can send Model_Mail as $receiver parameter.
Merge branch 'master' of github.com:Hete/kohana-mail