v1.3

Add cputest-basic.sfc ROM that only tests basic functionality (e.g. no emulation mode tests).

The cputest-full.sfc ROM performs all tests as before.

v1.2

• Test undocumented behavior of (direct,x) addressing mode (described in README).
• Small improvements to existing tests.

v1.1

• Fix PLB test
• Temporarily disable (dp,X) emulation mode tests until further research

v1.0

Initial version