Fix input events fired when various joystick buttons are pressed simultaneously.

git-svn-id: svn://svn.code.sf.net/p/fuse-emulator/code/trunk@4914 82cbdd72-22ac-47d8-a7df-4a7c34dd7743
Allow up to 15 joytick buttons to be defined to accomodate e.g. XBox 360 ABXY
button use (patch [#309]).


git-svn-id: svn://svn.code.sf.net/p/fuse-emulator/code/trunk@4915 82cbdd72-22ac-47d8-a7df-4a7c34dd7743
Include read and computed checksum (thanks, Ivan Shmakov).


git-svn-id: svn://svn.code.sf.net/p/fuse-emulator/code/trunk@4916 82cbdd72-22ac-47d8-a7df-4a7c34dd7743
Print flag byte (thanks, Ivan Shmakov).


git-svn-id: svn://svn.code.sf.net/p/fuse-emulator/code/trunk@4917 82cbdd72-22ac-47d8-a7df-4a7c34dd7743