2.3.15:

* Added optional starting_folder_uri parameter, to use, 
  for instance, when opening an examples folder.
  convenience method.
* g++ 4.01 build fixes.
* Translations: Added Ukranian (Maxim Dziumanenko),
  Greek (Kostas Papadimas), Chinese (Taiwan) (Chao-Hsiung Liao),
  Chinese (China) (Funda Wang), British English (Christopher Orr), 
  Spanish (Francisco Javier F. Serrador), 
  Brazilian Portugese (Raphael Higino), 
  Canadian English (Adam Weinberger), Kinyarwanda (Steve Murphy),
  Norwegian (Marcel Telka)