Integrated a styler.

Mail_Sender::factory()
    ->styler($styler) // Set a new styler engine
    ->style('div{background:blue}') // Update style (alias for ->styler->style())
    ->send('foo@bar.com', 'Foo subject', 'foo view'); // Send as usual
Added unit tests.
Added an auto styler Text::auto_p and Text::auto_link.
Using cache in html styler for not parsing css.
Documentation and defined('SYSPATH') or die.
Added unit tests.
Added an auto styler Text::auto_p and Text::auto_link.
Using cache in html styler for not parsing css.
Documentation and defined('SYSPATH') or die.
README.md
Merge branch 'feature-styler' of github.com:Hete/kohana-mail into feature-styler