Add benchmark script and instances

infinity/benchmark/3row-cont/danoint.pre.log

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+[      0.00] multirow (git-4d20687d04e75dc63c7bb84cbbfeb2261c6a6ab2)
+[      0.00] mf-hpc-1-3.local 2017-03-11 22:10
+[      0.00] Compile-time parameters:
+[      0.00]     EPSILON: 1.000000e-08
+[      0.00]     GREEDY_BIG_E: 1.000000e+03
+[      0.00]     GREEDY_MAX_GAP: 1.000000e-04
+[      0.00] Command line arguments:
+[      0.00]     ../build/infinity.run --mir --greedy --problem instances/danoint.pre.mps.gz --basis bases/danoint.pre.bas --log 3row-cont/danoint.pre.log --stats 3row-cont/danoint.pre.yaml --solution solutions/danoint.pre.x --rows 3 
+[      0.00]     600 rows, 978 cols
+[      0.00] Storing column types...
+[      0.00] Relaxing integrality...
+[      0.00] Disabling presolve...
+[      0.00] Optimizing...
+[      0.00]     opt = 62.637280
+[      0.00] Reading tableau rows...
+[      0.01] Adding MIR cuts...
+[      0.02]     opt = 62.637304
+[      0.02]     opt = 62.690000
+[      0.03] Optimizing...
+[      0.03]     opt = 62.690000
+[      0.03] Adding greedy intersection cuts (2 rows)...
+[      0.03]     Finding combinations...
+[      0.04]         1116 combinations [0.05]
+[      6.23] Adding greedy intersection cuts (3 rows)...
+[      6.23]     Finding combinations...
+[    110.57]     maximum number of combinations reached. stopping.
+[    110.57] Optimizing...
+[    110.57]     opt = 62.690000
+[    110.58] Writing stats to file 3row-cont/danoint.pre.yaml...