Beta 4:

- check openal32.dll version before using
- accept 1.5.1 language DLL files (no GUI changes)
- Catweasel: do not use direct access to read joyports if driver is installed, caused conflicts with driver provided joystick/mouse (note that I still donīt care about CW until 64-bit compatible drivers are released, if ever. Do not ask stupid questions.)
- fixed D3D 8876086C error if display number in configuration file was bigger than current number of displays
- display mode switching mouse cursor handling tweaks