Fixed a potential race condition when adding items
- Re-ordering might have put the not-yet-constructed node into the linked list
- Moved the important initialization outside of lock acquire, so there's a barrier
Merge branch 'master' of git@github.com:TwistedOakStudios/PerishableCollection.git

* 'master' of git@github.com:TwistedOakStudios/PerishableCollection.git:
  Update README.md