2012-4-3 meld 1.5.4
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Fixes:
* Slightly faster diff calculation (Piotr Piastucki)
* Avoid too-tall commit dialogues (Nguyễn Hồng Quân)
* Minor bug fixes and performance improvments (Kai Willadsen)
Translation updates:
* Alexander Shopov (bg)
* Fran Diéguez (gl)
* Kjartan Maraas (nb)
* Kristjan SCHMIDT (eo)
* Nguyễn Thái Ngọc Duy (vi)
* Toshiharu Kudoh (ja)
* Trương Ứng Minh (vi)
* Мирослав Николић (sr) (sr@latin)