Don't fail if Edit menu can't be found.

E.g. when the translations differ, use lookup by position.

Fixes #554.
Provide Retina artwork.

Where necessary (window-close and the Validate toolbar button), redo the
existing one so that the two versions match.
OS X: Fix layout and rendering issues on Retina displays.
Install dump-legacy-tm.exe.
Don't use MMapDirectory on Windows.

Looks like memory-mapped access isn't quite ready for prime time in
Lucene++ yet. Use the old fashioned SimpleFSDirectory.

Hopefully fixes #558.
Fix waiting for dump-legacy-tm termination on Unix.

The SIGCHLD signal would never be delivered in case of error.
Add (more) detailed logging of TM migration process.
Fix misdetection of empty PO files as invalid.
Increase version to 1.6.1, update NEWS.
Add .phtml extension to parsers.

It is used by the Zend Framework for PHP files.
Add --add-comments=translators: xgettext argument.

In addition to TRANSLATORS, use WordPress' translators: by default as well.
Disable logs timestamping.
Fix failures to work with the TM in non-ASCII paths.

LucenePlusPlus has broken code for handling with Unicode paths - it
converts them with UTF-8 even on Windows, where it's all but guaranteed
to break.  Fixing it is not entirely trivial, so work around this in the
meantime by using short paths on Windows.

See #560.
Update Japanese translation file for 1.6
Update German translation
Partial translation

Fixed some mistakes and translated some additional strings
Merge pull request #51 from yarons/patch-4

Partial Hebrew translation
Update Hungarian translation.
Update Basque translation.
Update Dutch translation.