Al Bunnys Typing Class

In the previous uploaded version(1.40b), there is a serious bug which blocks an important feature of this program. This version(1.40c) fixs that. Some major changes and bug fixs since version 1.40 are 1. Fix a bug which causes Al Bunny fails to open if the user close Al Bunny last time with speed mode set to "user-defined" 2. Fix a bug in the pre-defined keysets. Now the non-US keyboard user will feel that these keysets make more senses. For example, in level 2 in German keyboard, the user practice 'z' instead of 'y'. 3. Fix a mistake in US-Dvorak keyboard layout file. 4. A change in Racing-Game. Now the obstacle will be moved up after the user enters the string correctly.