Add docu for TestCore

Added for docu for all functions
6 jobs for tests in 1 minute and 45 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Lint
passed #1739
lint:lint-php5.4

00:00:44

passed #1740
lint:lint-php5.6

00:00:41

passed #1741
lint:lint-php7.0

00:00:43

passed #1742
lint:lint-php7.1

00:00:41

 
  Codesniffer
passed #1743
codesniffer

00:00:29

 
  Unit
passed #1744
unit:testRead

00:00:31