adding feature to output CSV files (issue #44) #450

Job	Run time
test_matrix (ubuntu, 2.5)	25s
test_matrix (ubuntu, 2.6)	25s
test_matrix (ubuntu, 2.7)	26s
test_matrix (ubuntu, 3.0)	13s
test_matrix (ubuntu, 3.1)	14s
test_matrix (ubuntu, 3.2)	9s
test_matrix (ubuntu, 3.3)	11s
test_matrix (ubuntu, head)	12s
test_matrix (ubuntu, truffleruby)	32s
test_matrix (ubuntu, truffleruby-head)	38s
test_matrix (ubuntu, jruby)	41s
test_matrix (ubuntu, jruby-head)	40s
test_matrix (macos, 2.5)	8s
test_matrix (macos, 2.6)	33s
test_matrix (macos, 2.7)	36s
test_matrix (macos, 3.0)	20s
test_matrix (macos, 3.1)	18s
test_matrix (macos, 3.2)	16s
test_matrix (macos, 3.3)	15s
test_matrix (macos, head)	18s
test_matrix (macos, truffleruby)	39s
test_matrix (macos, truffleruby-head)	51s
test_matrix (macos, jruby)	31s
test_matrix (macos, jruby-head)	34s
finish	0s
	10m 5s

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