+ - added support for 16 bit WAV sound files
+ - added "quick save" and "quick load" functions with shortcut key
+ - added single-step playing mode (automatic pause after each step)
+ - changed default slipping behaviour of gems back to 2.0.0 style;
+ this is now an element property for gems in the level editor,
+ although existing converted levels use the new EM gems behaviour
+ - behaviour of "Escape" key in level editor now more intuitive