Removed core module files.
Added modulargaming/core to composer.json.
Removed user module.
Added modulargaming/user to composer.json.
Removed admin module.
Added modulargaming/admin to composer.json.
Removed forum module.
Added modulargaming/forum to composer.json.
Removed item module.
Added modulargaming/game to composer.json.
Removed item module.
Added modulargaming/item to composer.json.
Removed message module.
Added modulargaming/message to composer.json.
Removed pet module.
Added modulargaming/pet to composer.json.
Merge branch 'feature/composer-refactor' into develop