UnionFind moved to include. Test compiles and runs cleanly.
* test/makefile:
minor cleanups
2 elapsed time: 0.510031 sec
4 preflow demo (BOOST)...
5 elapsed time: 1.32288 sec
7 preflow demo (preflow_push_max_flow by JACINT)...
8 elapsed time: 0.300136 sec
11 preflow demo (preflow_push_hl by JACINT)...
12 A is 1 elapsed time: 0.4667 sec
15 preflow demo (ATHOS)...
16 elapsed time: 0.150702 sec
19 elapsed time: 62.3518 sec
21 edmonds karp demo (ALPAR)...
22 elapsed time: 58.7259 sec
24 edmonds karp demo (BOOST)...
25 elapsed time: 185.794 sec