Revision history for Async-Stream

0.01    24.06.17
        First version, released on an unsuspecting world.

0.03    24.06.17
        Adding arguments validation

0.04    24.06.17
        Fix for bug with several request to same item

0.05    07.07.17
        rename public method sort -> arrange, cut_sort -> cut_arrange, each -> for_each
        add posobility to make streams with prefetching.

0.06    09.07.17
        Adding possibility to merge and branch streams
        
0.07    12.07.17
        Adding methods distinct and any, Rename method concat to append.

0.10    26.08.17
        1) Rework public interface
        2) Add pushable streams
        3) add reverse and spray methods

0.11    27.08.17
        Add files to manifest

0.12    27.08.17
        Add methods shift and shift_each