Log Message:
Update ruby-mail to 2.6.3.

== Version 2.6.3 - Mon Nov 3 23:53 +1100 2014 Mikel Lindsaar \ 
<mikel@reinteractive.net>

* #796 support uu encoding (grosser)

== Version 2.6.2 (Unreleased) - Wed Oct 22 13:42 -0500 2014 Benjamin Fleischer \ 
<github@benjaminfleischer.com>

Performance:
* #681 - fewer hotspot object allocations (srawlins)
* #815 - autoload parsers for load-time speed and memory usage (grosser)

Bugs:
* #736 - Mail.new copes with non-UTF8 messages marked as UTF8 (jeremy)

== Version 2.6.1 - Sun Jun 8 15:34 +1100 2014 Mikel Lindsaar \ 
<mikel@reinteractive.net>

Features:
* Silence warnings on loading ragel-generated parsers (bf4)

== Version 2.6.0 - Mon Jun 2 22:49 +1100 2014 Mikel Lindsaar \ 
<mikel@reinteractive.net>

Features:
* Allow interceptors and observers to be unregistered (zuhao)
* Added feature to find the mail in uid (taketin)
* Save settings passed to TestMailer#new (svanderbleek)
* Allow the setting of envelope from directly (jeremy)
* Accept other IETF/IANA-registered Content-Types and Content-Transfer-Encodings \ 
(jeremy)
* Alias shift-jis charset to Shift_JIS Ruby encoding (jeremy)
* Add support for ks_c_5601-1987 charset, aliased to CP949 Ruby encoding (jeremy)
* Don't allow colons in header names (jeremy)
* Can assign arrays of Message-IDs to References and In-Reply-To (jeremy)
* Setting the html_ or text_part sets a default text/html or text/plain content \ 
type (jeremy)
* Setting the html_ or text_part to nil removes it (jeremy)
* Addresses without a parsable email or display name still format as their raw \ 
text (jeremy)
* Close pull request 504 - Alias GB2312 charset to GB18030 Ruby encoding (bpot)
* Close pull request 399 - Accept :ca_path and :ca_file options for SMTP \ 
delivery (ndbroadbent)
* Close pull request 389 - Don't add superfluous message headers to MIME parts \ 
(djmaze, jeremy)

Performance:
* Migrate to RAGEL based parser, awesome work by (bpot)
* Performance improvements for people parsing email headers (ConradIrwin)
* Close pull request 488 - Speed up field construction & comparison (bpot)

Bugs:
* Fix for when content looks like field name (kjg)
* Don't change original when you change a copy (TylerRick)
* Don't include separating semicolon in paramter value when sanitizing (bpot)
* Fix fencepost encoding problem with binhex strings and only one token (drasch)
* Fix sendmail delivery to addresses with a leading hyphen (lifo, jeremy)
* Correctly format mbox From headers per RFC4155 (bpot, jeremy)
* Fix bogus '=' at the end of some quoted-printable messages (jeremy)
* Shouldn't be fooled into encoding strings on 1.8 by unrelated Encoding \ 
constant (emiellohr, jeremy)
* Header encoding should be US-ASCII, not the default external encoding (jeremy)
* Address elements should return decoded display names by default (jeremy)
* Fix up tests that depend on utf-8 external encoding; read fixtures as binary \ 
(jeremy)
* Capture stderr from Sendmail and Exim deliveries (jeremy)
* RFC2822 quoted_string content may be empty (jeremy)
* Calling #to_s on a field with a nil value returns an empty string instead of \ 
nil (jeremy)
* The Received header may contain zero name/value pairs, qmail-style (jeremy)
* Fix that setting an attachment with a :mime_type and :encoding would override \ 
the :encoding (jeremy)
* Fix that declaring an html_part but no text_part would use \ 
multipart/alternative anyway (jeremy)
* Close pull request 508 - Don't add an extra CRLF to MIME parts; split MIME \ 
parts on correct CRLF boundaries (Aalanar)
* Close pull request 506 - Escape backslashes in quoted strings (ConradIrwin)
* Close pull request 496 - Correctly handle quoted-printable line breaks (jeremy)
* Close pull request 493 - Repair misencoded quoted-printable line breaks (jeremy)
* Close pull request 487 - Extract comments from group email addresses (bpot)
* Close pull request 481 - Correctly quote filename attributes (bpot)
* Close pull request 480 - Support mixed encodings in a single header body \ 
(adamvaughan)
* Close pull request 471 - Fix Ruby 1.8 build when UTF16/32 default to \ 
little-endian (kennyj)

Coping with third-party bugs:
* Parse multipart boundary from Content-Type headers containing extra semicolons \ 
(jeremy)
* Close pull request 389 - Only add Content-ID to inline attachments to appease \ 
Outlook (djmaze, jeremy)

Housekeeping:
* Add development gem dependency on rdoc (jeremy)
* Refresh Bundler dependencies & setup (jeremy)
* Remove i18n dependency and last vestiges of activesupport dependency in specs \ 
(jeremy)
* Clarify that Sender is a single address, not an address list (jeremy)
* Add an MIT-LICENSE file to make licensing clear & obvious; update to 2013 \ 
(jeremy)
* Close pull request 501 - Tighten up header/body whitespace splitting (ConradIrwin)
* Close pull request 499 - Clean up some dead code (ConradIrwin)
* Close pull request 489, 495 - Docs typos (JackDanger, francois)
* Close pull request 485 - Be explicit about unsupported address parsing (bpot)
* Close pull request 484 - Remove #tree specs in preparation for deprecation \ 
removal (bpot)
* Close pull request 482 - Update address field specs to reflect to #initialize \ 
API (bpot)
* Close pull request 475 - Shush warning on Object#blank? redefinition (amatsuda)
* Close pull request 472 - Clean up UTF8/UTF-8 internals (kennyj)