MozillaThunderbird: Update to 31.1 release (important)

MozillaThunderbird was updated to Thunderbird 31.1.0 bnc894370, fixinfg security issues: MFSA 2014-67/CVE-2014-1553/CVE-2014-1562 Miscellaneous memory safety hazards MFSA 2014-68/CVE-2014-1563 bmo1018524 Use-after-free during DOM interactions with SVG MFSA 2014-69/CVE-2014-1564 bmo1045977...