Support and document usage with the Moodle App #521

Job	Run time
CI test (make validate)	26s
Code coverage (codecov)	25s
Build moodle-plugin-ci.phar	35s
Integration tests (8.2, master)	5m 26s
Integration tests (8.2, MOODLE_403_STABLE)	5m 20s
Integration tests (8.2, MOODLE_402_STABLE)	5m 6s
Integration tests (8.1, MOODLE_401_STABLE)	6m 19s
Integration tests (8.0, MOODLE_400_STABLE)	6m 10s
Integration tests (8.0, MOODLE_311_STABLE)	5m 35s
Integration tests (7.4, MOODLE_310_STABLE)	5m 7s
Integration tests (7.4, MOODLE_39_STABLE)	5m 11s
Integration tests (PHAR) (8.2, master)	4m 41s
Integration tests (PHAR) (8.1, MOODLE_403_STABLE)	4m 53s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	5m 33s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 17s
	1h 6m 4s

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