some improvements over @demiurg906's pull request#119

Merged

fabianp merged 20 commits intomasterfrom

demiurg906-tracemalloc-backend

Aug 19, 2016

Commits on Jul 13, 2016

TEST added test for ``tracemalloc``
demiurg906
committed

Commits on Jul 14, 2016

Commits on Jul 18, 2016

FIX ``_backend_chosen`` variable deleted from everywhere
demiurg906
committed

Commits on Aug 11, 2016