feat: Adds `resendfailedbatches` setting to allow failed statements to be retried. (#367 - Thanks @garemoko)

feat: Adds `idnumber` to extensions for courses and course modules to close #230. (#272 - thanks @trewq)

fix: Limits the events processed in the cron to avoid overflows and timeouts (Thanks @AndyHubert). (#203)

BREAKING CHANGE: Removes some statements.

Turn on xapi_logstore file debugging when Moodle debugging is turned on.
(maybe this should go into os level standard logs as well, so it not bloating inside the folder?)

Applied Moodle coding style, moved all tests into tests/ directory, got tests passing under Moodle's PHPUnit test framework

Added moodle config proxy parameters