Strip and lowercase email addrs for Gravatar: Bug #732718

As per Gravatar's spec.
Add tooltip to compact composer header

https://bugzilla.gnome.org/show_bug.cgi?id=732647
Updated Hebrew translation
Object being passed for string in printf-style statement

Newest version of Vala apparently catches this (older versions
compiled w/o complaint).  Caught by GNOME Continuous.
Updated Czech translation
Avoid critical errors when addresses is null

https://bugzilla.gnome.org/show_bug.cgi?id=732982
Updated Polish translation
Updated Italian translation
Updated Brazilian Portuguese translation
Use HeaderBars for composers

Move the buttons from the bottom of the composer into the header.  The
draft save text is moved into the composer toolbar, for lack of a better
location.  When it's inline, we insert our own close button, so we can
control what it does.  When it's detached (and not using Unity), we
enable to default close button.

https://bugzilla.gnome.org/show_bug.cgi?id=731537
Update to version 0.7.0
Shift special folder priorities when synchronizing account

This patch solves two issues: (a) sometimes messages stick around in
conversations too long because Geary hasn't synchronized with Trash
(therefore realizing they should be blacklisted), and (b) All Mail can
take a long time to synchronize because of its bulk size.

This patch moves Trash (and Sent Mail) higher up in priority and moves
All Mail and Archive down to reflect these issues.
New detach icon for inline composer

https://bugzilla.gnome.org/show_bug.cgi?id=733370
Updated Polish translation
Updated Brazilian Portuguese translation
Added Basque language\nAdded 'eu' (Basque) to LINGUAS
Updated Spanish translation
Force inline ComposerHeaderbar to have square corners

Also ensure that the main window HeaderBar has square corners when
running with ENABLE_UNITY.

https://bugzilla.gnome.org/show_bug.cgi?id=733374
Set the side of the window buttons in the HeaderBar from the GTK theme

Make two sets of the buttons, one for the start and one for the end of
the HeaderBar, and show one or the other based on the the theme.  Watch
the style context for changes in the theme and update accordingly.  Once
the composer is detached, the default close button is used, so hide both
and stop watching for style updates.  This assumes we never re-attach a
composer.

We also add a bit of space between the separator and the detach button.

https://bugzilla.gnome.org/show_bug.cgi?id=733372
Updated Czech translation