Log Message:
Changes 0.9.4:
*  True RPN mode with stack manipulation
* Dutch translation (from Jaap Woldringh and the Dutch KDE translation team)
* New application icons (from Thomas Lübking)
* API documentation (approximately halfway)
* Enhanced edit matrix/vector dialogs, with widget for GTK+
* View/edit/insert matrix/vector menu items (GTK+)
* Combined dialog for number bases in result and expression (GTK+)
* Fix comma as decimal sign with KDE GUI
* "Convert to Best Unit" and "Convert to Base Units" was \ 
swapped (KDE)
* Ignore commas (with dot as decimal sign) in numbers and option to use dot as
  thousands separator
* Fix removal of factors in simplifaction ("1 kg m/s" was simplified to
  "1000 m/s")
* Fix libqalculate.so unresolved symbols
* Fix bug that caused all number arguments to require numbers to be rational
* Interpret 0x..., 0o... and 0b... as hexadecimal, octal and binary numbers,
  respectively, when base is decimal
* Ability to represent numbers as 0x0feff (for HEX), 0b0011101010 (for BIN)
* Set vectors and matrices as the first argument by default
* New functions
* Fix integration
* New unit: psi
* New name format in data files for more flexible translations
* Change some dubious mathematical wordings