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SPC DLL 2.22  :
  * fixed : Measurements with collection time > 80 sec in computers with fast ISA bus 
      	stopped sometimes too earlier - only for modules SPC4x0, SPC5xx

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SPC DLL 2.21  :
  * fixed : bug in SPC_pause_measurement 
  * fixed : module resources were disabled, when in computer BIOS 
                       the item  Plug & Play OS was set to YES  - only for modules
                        on PCI bus

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SPC DLL 2.2  :
  * this is probably the last released version of SPC DLL available for SPC ISA-bus modules
  * for SPC PCI-bus modules (6x0,7x0,130 ) SPCM DLL (version 7.3 or higher) should be used 
  * SPC DLL will be not developed further ( except fixing bugs) 
  * small bug fixups are done in this version
  * collection & repeat time = 30.0sec  for SPC300 modules - bug fixed
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SPC DLL 2.12 :
  * pci_bus_no added in .ini file - enables using modules on different PCI busses

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SPC DLL 2.11 :
  * SPC_pause_measurement improved
  * fixed bug in taking cfd_zc_level and sync_zc_level from .ini file

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