New options that allow fine grain control of how to capture a video.

Also made extension (container) and video encoder separate concepts.
More modularity to the way encoding is performed.

Also made Union more explicit, raises Python3 compatibility.

Makes use of temporary directory.

Makes use of hex based colors to simplify interface.

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.