Roundcube Webmail 1.3-beta

This is a beta release of the next major version 1.3 of Roundcube webmail.
With this milestone we introduce some new features:

• Widescreen layout aka Three Column View
• Possibility to display QR code for contacts data
• New identicon plugin
• Attach contact vCards to composed message
• Support WEBP images and MathML preview
• Preview, download and rename attachments when composing a message
• message/rfc822 attachment preview
• Various Enigma (PGP) and Managesieve plugin improvements

Plus security and deployment improvements:

• Improve randomness of password salts and random hashes
• Fixed redundancy in sql caching system and compatibility with Galera Cluster

And finally some code-cleanup:

• Dropped support for legacy browsers (IE < 10; removed legacy_browser plugin)
• Require PHP >= 5.4
• Removed PHP mail() support
• Removed 3rd party javascript libraries from repo

IMPORTANT: The code-cleanup part brings major changes and possibly incompatibilities to your existing Roundcube installations. So please read the Changelog carefully and thoroughly test your upgrade scenario.

Please note that Roundcube 1.3

1. no longer runs on PHP 5.3
2. no longer supports IE < 10 and old versions of Firefox, Chrome and Safari
3. requires an SMTP server connection to send mails

In case you're running Roundcube directly from source, you now need to install the removed 3rd party javascript modules by executing the following install script:

$ bin/install-jsdeps.sh