update author of imageController
start model comments
start associative model comments
finish associative model comments
correct wrong comments for create_rules and update_rules
complete first round of model comments
modify incomplete comments on certain classes and controllers
update staffController comments
comment update and destroy methods in certain controllers
add authors to model comments
comments for scope methodes in Artist model
comments for controller function traits
complete comments for controller traits
fix sharing model conflicts
comment model function traits
comment completePivotModelTrait
comment the last model traits
update savePivotTrait
complete LinkController comments
resolve conflicts