Provide a data API

[oubiwann]

This is to make things easier for applications that want to use loise-generated data.

First usage is expected to be this: ut-proj/undertone#110

Tasks:

• Add new loise-data module
• Add tests for loise-data
• Add loise-data functions to the API via loise:data
• Update other modules to use loise-data
  • loise-ascii
  • loise-perlin
  • loise-simplex
• Add a function that, given a point, returns a value
• That, given a list of points, returns a list of values

Related

• Implement a random walk scan through noise data #53
• Add utility function to overlay path traversals on noise images #56
• Add support for finite data traversals #60
• Manage noise stacks / layers / bands #63
• Support centralised, long-running state data #64

[oubiwann]

I'm going to pause on this work a bit and start hacking #53, #56, #60, #63, and #64 to get a better sense of the sort of functions the data API should provide and what the sigs should look like ...

[oubiwann]

Done.