Overview of changes in gcalctool 5.29.4

    * Make 0^0 = 1 (Robert Ancell, Bug #605011)

    * Use superscript digits for scientific notation (Robert Ancell)

    * Clear display when entering a number after an equation (Robert Ancell)

    * Make Ctrl+W a shortcut to quit (Robert Ancell)

    * Updated translations: et (Ivar Smolin), ro (Lucian Adrian Grijincu),
                            zh_CN (Tao Wei)