(1) Updates documentation.
(2) Remove 'current' and 'previous' hardware fields. X just do not play fair,
    and one cannot assume anything about current hardware state.
(3) Changes algorithm for computing PLL parameters to one used by Matrox. On
    recent chips (G550) there are no limits for PLL, you just have to try
    couple of possible combinations to find which one works on this
    particualr hardware.
(4) Add code which can intialize G450/G550 when BIOS did not initalize it
    (non-ia32 hardware, secondary devices on ia32 hardware).

				Petr Vandrovec