Merge pull request #3 from jaynel/selective-receive

Use make_ref() before selective_receive for VM message queue optimizatio...
Merge pull request #4 from jaynel/selective-receive

Ensure a new value added to cache doesn't block existing key fetches
Merge pull request #5 from jaynel/selective-receive

Rewrite and validate reap_oldest
Added timer to give cache time to empty
Log M:F crashes when launching a new datum value pid