Change log started July 2009.
September 2009
================================================================================
+ Added IFF.write()
+ Added a Quetzal class.
+ ge_saveGame() now uses the Quetzal class.
+ ge_loadSavedGame() uses the Quetzal class too.
July 2009
================================================================================
+ Set the Z Machine Spec version header
+ The optimised storew opcode would not correctly account for negative addresses.
+ Inlined the ge_varcode_set() call in ge_func_return()
+ Inlined calls to getWord() in handleZ_loadw() and ge_get_prop()