SA1 in-game hooks, reset, minor performance, decimal mode and other fixes.

This update enables some limited use of in-game hooks for reset via controller buttons. It also fixes a reset problem when loading a new fpga file (e.g. sa1) that would result in a black screen. Only sa1 games will have this fix. Partial binary coded decimal support has been added to fix a scoring bug in the smrpg beetle game.