Gif export

Using pillow to export gol to gif

Played with Pillow and made it work for me, there is this odd thing happening with the output where the gliders im not sure it’s a problem with how things are displayed, or something internal in BHV. Feel free to check it out.

Hi! This has raised a few warts. While this works for some implementations, it doesn't for others for some very nasty reasons: there are three different orders going on, resulting in the weird patterns: Order of bits of byte, order of byte of word, and order of words. In one implementation, all three align, and dumping the hypervector to a file format works. In the other implementations, you'd need to reverse some of the words.

Since this only matters for visualization purposes (i.e., all implementations are self-consistent), I haven't pushed my changes (that built on this PR). I don't want to sacrifice performance (e.g., using a non-native byte order) for this purity.

While I'm enthusiastic about the CA use case, fast GIFs are in direct opposition to a fast implementation. Therefore, I'll try and write a fast and correct "bits/bitstring" function, that converts to the "logical" representation (move bits in the directions of the roll), which will have to be specialized for each implementation.