Add TLogView class.

Add TLogView class.

* Add TLogView class.
  [LogViewClass.pas]
* Unify logging.
  [AsmFileIOClass.pas], [FunctionsClass.pas]
* Add logging capability.
  [AsmGridClass.pas], [HardwareClass.pas], [SteppingClass.pas]
* Add a TLogView object.
  [FPUFormClass.pas]
* Add new menu items.
  [FPUFormClass.dfm], [FPUFormClass.pas]
* Improve open/save dialogs.
  [FPUFormClass.dfm]
* Move APP_VERSION constant.
  [ResourcesClass.pas], [ConstantsClass.pas]
* Add resources to support new functionality.
  [ResourcesClass.pas]
* Add types to support new functionality.
  [TypesClass.pas]