Update strings.xml

(RU) Various improvements and fixes. The some terms are unified with desktop clients (e. g. Sylpheed).
Fix caching of fallback contact icons.

The cache key must be consistent with how calcUnknownContactLetter()
works, otherwise one gets the same fallback icon for different senders.
Fix build with latest SDK tools.
Some assorted warning fixes.
Update German translation
Change wording in changelog; fix typos
Use address object as contact picture instead of email address only.

Fixes assignment problems for emails sent by some issue tracking
systems, which send out mails with a fixed mail address on behalf of
different people.
Updated Slovak translation
Merge pull request #391 from pylerSM/patch-2

Updated Slovak translation
Merge pull request #390 from bboa/master

Update strings.xml
Don't performSend() on onSave().
Fix JavaDoc to match the changes in ContactPictureLoader
ContactPictureLoader code cleanup
new dev branch series
4.700 changelog
Bumped manifest to 4.700
Delete related files when deleting a database.

The journal file was not being deleted when an account was deleted.
Over time, one can end up with a collection of dead journal files.
Contact picture fix.

Clear out old/unrelated (previously bound) contactBadge info in
MessageListAdapter.bindView that could otherwise be displayed
when tapping on a contactBadge with no counterpartyAddress (may
require scrolling the message list up and down first before the
bug becomes evident).
Update the tests project.

Target the same SDK version as in K-9 Mail.

Update the .classpath file as modified by the latest Eclipse ADT plugin.

Remove unused import.
Eliminate unnecessary override in LocalAttachmentBody.

The overriding code is the same as the overridden code.