Refs #3577 Fixes dependency on the HTML class for error catching
fix send_file() error on mime type (refs #4678)
follow 3.3's conventions by using mime_by_ext
pass the extension, not the filename
Merge pull request #393 from melvinmt/bugfix/4678

fix send_file() error on mime type (refs #4678)
Refs #3925: Delete Cookie::Set from the Cookie::Delete docs
Merge pull request #395 from rjd22/3.2/bugfix/delete_cookie_set_from_docs

Refs #3925: Delete Cookie::Set from the Cookie::Delete docs

(refs #3501 for the reason of the `Cookie::set` removal)
Merge pull request #387 from rjd22/3.2/change/make_error_view_independent

3.2/change/make error view independent
Merge remote-tracking branch 'origin/3.2/develop' into 3.3/develop

Conflicts:
	classes/Kohana/Response.php
	views/kohana/error.php