Got my websites back up (Finally!)

Fixed a few minor issues on JSnes:

- Fixed CPU cycles per scaline
- Implemented a handful of new opcodes.
- Fixed directPageIndexedIndirect memory mode in CPU emulation
- Fixed bug on certain 256 Colour mode backgrounds

There are still a lot of bugs, but the above also means that some more games start to run. A handful of basic commercial titles are now playable to some extent.

If you have decent snes / emulation knowledge and want to help out, please contact me.