Implement Function Module

[peteut]

• [x] __
• [ ] add_index
• [x] always
• [x] ap
• [x] apply
• [ ] apply_spec
• [ ] ascend
• [ ] binary
• [ ] bind, not relevant?
• [ ] call
• [ ] comparator
• [ ] compose
• [ ] compose_k
• [ ] compose_p, should probably work w/ asyncio.Future
• [x] construct
• [ ] construct_n
• [x] converge
• [x] curry
• [x] curry_n
• [ ] descend
• [x] empty
• [ ] F
• [x] flip
• [x] identity
• [x] invoker
• [ ] juxt
• [x] lift
• [x] lift_n
• [ ] memoize
• [ ] memoize_with
• [ ] n_arg
• [ ] nth_arg
• [ ] o
• [x] of
• [ ] once
• [ ] partial
• [ ] partial_right
• [x] pipe
• [ ] pipe_k
• [ ] T
• [ ] tap
• [ ] try_catch
• [ ] unapply
• [ ] unary
• [ ] uncurry_n
• [ ] use_with