Switched graphopt from operating on the input graph to produce a new graph. Requires clustering repair.
Added start/end relabeling, and fixed error in graph_optimize return.
Fixed clustering to work with new graph generation.
Added show to Makefile
Made node renaming part of simplegraph creation.
Full rewrite of epsilon merging. Now correctly detects some horrifying edge cases.
Merge branch 'master' of github.com:courageousillumination/dotpimizer