CONTRIB-5240 Rename phpcompatibility dir to camelcase.
CONTRIB-5240 Also rename PHPCompatibility test fixtures.
CONTRIB-5240 Fix all uses to new PHPCompatibility.
CONTRIB-5240 Also lowercase all "Moodle" to match the standard.
Merge pull request #18 from stronk7/CONTRIB-5240

Fix CamelCase problem in local_codechecker