Zim 0.43 released

Written for Zim by Jaap Karssenberg on 2010-01-18

This is a bug fix release which includes a number of fixes related to indexing notebooks created with older versions of zim. Issues with duplicate entries in the index for older notebooks have been resolved. Also a bug with the text formatting buttons in the toolbar has been resolved. Translations were added for English (United Kingdom), Greek and Polish.