Add docs #99

Job	Run time
Collect tests	7s
Code coverage (phpunit_test)	7m 14s
Code coverage (phpunit_bisect_test)	9m 22s
Test (phpunit_test)	6m 56s
Code coverage (behat_test)	8m 0s
Test (phpunit_bisect_test)	9m 18s
Code coverage (behat_bisect_test)	7m 14s
Test (behat_test)	7m 42s
Code coverage (runner_test)	1m 45s
Test (behat_bisect_test)	6m 54s
Code coverage (postjobs_test)	13m 3s
Test (runner_test)	1m 39s
Test (postjobs_test)	12m 53s
	1h 32m 7s

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