Add a priority queue based on finger trees#279

Merged

jbgi merged 25 commits intofunctionaljava:masterfrom

Jun 19, 2016

Commits on Jun 2, 2016

Added int min, int max and ord monoid. Added FingerTree empty and int max for pqueue's
mperry
committed
Added show instances and toString implementations for finger trees
mperry
committed
Test show on finger trees to expose what is going on inside the finger tree
mperry
committed

Commits on Jun 3, 2016

Commits on Jun 4, 2016

Added priority queue show, toStream, toString. Fixed enqueue and dequeue
mperry
committed

Commits on Jun 18, 2016

Commits on Jun 19, 2016