Containers backed by Phobos' experimental allocators

 This D module implements container types based on the
 std.experimental.allocator allocator design.
 .
 It includes implementations of the following container types:
  - Dynamic Array
  - Hash Map
  - Hash Set
  - Immutable hash set
  - Open-Addressed Hash Set
  - SIMD-accelerated Set
  - Singly-linked list
  - Tree Map
  - T-Tree
  - Unrolled Linked List