[NEXT] N-d arrays

[Sir-NoChill]

Should we allow support for arbitrary shaped arrays? Some more things to consider here:

• Is broadcasting a thing in gazprea?
  • If this is, then we need to do a very precise definition of how.
• Are there builtin operations defined on them?
• Do we need to change the definition of rows and columns?
  • Perhaps eliminate both and instead use something like shape.
• Interactions with tuples, structs and nesting.