21st April, 2014 - Release S4/1.05 (Standard 4, various optimizations)
Minor fixes and optimizations to source code; normalized sound samples volume
to a higher level; added the new "About" screen.

September 17th, 2012 - Release S4/1.04 (Standard 4, manual added)
Added the instructions manual browser and a boxshot of the international version
of the original handheld; changed the program name from tennists to tennisms.

December 20th, 2010 - Release S4/1.03 (Standard 4, more accuracy)
Fixed a bug concerning the "silent" "game over" routine.

January 8th, 2010 - Release S4/1.02 (Standard 4, more accuracy)
All source code was tested again; found a few bugs and unaccuracies, which were
fixed; box picture was added to splash screen.

January 14th, 2008 - Release S4/1.01 (Standard 4, more accuracy)
More accuracy to the sound management timings system.
