|SOURCE|
[Common::Configuration]
* The psoition member funcitons return signed integers instead of unsigned
  integers
* Added display and screen number member functions and variables
* Moved the default variable setting code into a separate function,
  LoadDefaults
* Write writes out the display number and screen number
* Read reads in the display number and screen number (if present)
* If either the display number or screen number have not been set, the current
  display number and screen number are used
[Linux::Game]
* PreInitialise gets the display number and screen number from the
  configuration to use in the creation of the window