Summary
- merged
- patching the previous commit
- merged
- further Hensock tidy-up
- separate file for priority queue interface; extended Leftist_Heap.
- tuned GUI;
- tuned GUI;
- proper tooltip (amending fd8a65b026f1);
- updated to scala-2.12.3;
- auto update;
- updated to jdk-8u144;
- tuned GUI;
- more explicit failure;
- explicit indication of consolidated nodes;
- further tidying