Allowing frame by frame "navigation".

Allow simple screenshot saving.

Add a more functional approach to frame buffer update, using chunks.
Should improve scalar based processing.

The lazy evaluation is only support for DMG.

Avoids the segfault issue with the codegen-units = 1.

Handling of GameShark RAM banks differently.
Added parsing integer value errors.

Uses js-sys to interact with the Javascript VM, to obtain Date() reference.

Makes use of the most recent save state support in EmuKit.
Thumbnail image support.