Release Candidate 2

• A lot of code size optimizations
• Drum machine implementation - displaying in TAB editing mode, SFX names instead of notes, for SFX with DFD modulation
• Implementation of the IO->NEW option
• Getting rid of address conversion in SFX engine
• Fixes to data memory allocation and access
• Final version of SFX engine
• API for MadPascal
• Extra keyboard shortcuts
• Clipboard for SFX and TAB modules
• Update documentation