Accepted Artifact for Collective Allocator Abstraction to Control Object Spatial Locality in C++

This is the accepted Artifact for the article "Collective Allocator Abstraction to Control Object Spatial Locality in C++", which has been published in the journal "The Art, Science, and Engineering of Programming" Volume 8, Issue 3. Authors: Takato Hideshima, Shigeyuki Sato, Tomoharu Ugawa For details on how to use this artifact please consult the `README.md`.