Functions for creating and composing streams.

• chunk_by/2
• chunk_every/2
• chunk_every/4
• chunk_while/4
• cycle/1
• dedup/1
• dedup_by/2
• drop/2
• drop_every/2
• drop_while/2
• each/2
• filter/2
• flat_map/2
• intersperse/2
• interval/1
• iterate/2
• map/2
• map_every/3
• reject/2
• repeatedly/1
• scan/2
• scan/3
• take/2
• take_every/2
• take_while/2
• timer/1
• transform/3
• transform/4
• unfold/2
• uniq/1
• uniq_by/2
• with_index/2
• zip/1
• zip/2