Fix bug in RFC822.Message.from_composed_email

This constructor didn't initialize the required RFC822.Date field,
which causes a crash with the geary-mailer (and could potentially
cause issues elsewhere in the future).  However, had to expand the
RFC822.Date class in order to accomodate this fix.
Fix blank email due to Camel/Cased MIME type: Closes #7654

See also #6530, something we really need to do.
Add STARTTLS command to geary-console

However, STARTTLS won't work (at the connection level) until #7454
lands.
Fix IMAP STARTTLS handshaking: Closes #7454

The output stream was being inadvertantly closed right
before the STARTTLS handshake, causing the entire IMAP
connection to be considered dead.
Don't use non-wildcarded form of LIST command: Closes #7624

With IceWarp IMAP server, the non-wildcarded form of LIST that
Geary was some times using was causing the Spam folder to return
a different name, triggering an assertion in Geary.  This patch
works around that problem using an internal cache of folder names
and attributes, which is something we should've been doing anyway.
Indent and outdent icons for RTL: Closes #7551
Fix Search box clear button for RTL: Closes #7640
Update translations for 0.4.1: Closes #7646
Update version to 0.4.1, update NEWS/changelog

Conflicts:
	CMakeLists.txt
Bump to 0.4.1+trunk
Can't bld w/ Vala 0.22.1 WebKitGTK 2.2.2: Closes #7694, Closes #7695

Two problems:

(a) Vala 0.22.1 fixes a binding change in libnotify
that has to be fixed but causes Geary to be unable to build on prior
versions of Vala.  libnotify.vapi added to solve this problem.

(b) New version of Vala appears to be more sensitive to detecting
problems in .gir files.  Using our .metadata file to paper over these
issues in WebKit-3.0.gir.
Convert all MIME handling to Engine classes: Closes #6530

We've had numerous bugs due to improper MIME comparisons and dealing
with Content-Type and Content-Disposition (or their lack of presence
in a message).  Now the Engine offers MIME classes that better deal
with these issues without exporting the GMime structures, which
are not as easy to manage and don't offer some of the things that
have bitten us in the past (such as case-insensitive comparisons).
Add DOAP file for GNOME
Correct language codes of PO files
Capitalize description in DOAP file

To follow the convention.
Fix up po CMakeLists so Geary builds

Piotr Drąg had renamed a po file in commit:c83eed7 but not changed that
line in the po/CMakeLists.txt file, causing the build to break.  This
makes Geary build again.
Geary 0.4.2
Bump to Geary 0.4.2+trunk
Updated Hebrew translation
Resync he.po file