Support and document usage with the Moodle App #522

Job	Run time
Code coverage (codecov)	24s
CI test (make validate)	28s
Build moodle-plugin-ci.phar	33s
Integration tests (8.2, master)	5m 57s
Integration tests (8.2, MOODLE_403_STABLE)	5m 58s
Integration tests (8.2, MOODLE_402_STABLE)	5m 41s
Integration tests (8.1, MOODLE_401_STABLE)	6m 42s
Integration tests (8.0, MOODLE_400_STABLE)	6m 22s
Integration tests (8.0, MOODLE_311_STABLE)	5m 52s
Integration tests (7.4, MOODLE_39_STABLE)	6m 5s
Integration tests (PHAR) (8.2, master)	5m 34s
Integration tests (PHAR) (8.1, MOODLE_403_STABLE)	5m 53s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 29s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 46s
	1h 7m 44s

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