Updated the OliCore::loadContent() function
Updated the OliCore::loadContent() function

Added OliCore::$contentStatus
Added OliCore::getContentStatus()

OliCore::$contentStatus values: (set by OliCore::loadContent())
- Set as "index" if content is the home page
- Set as "found" if content is found
- Set as "404" if content is not found
- Set as "403" if access to content is forbidden

→ Development step for issue #12

OliFramework/Oli,OliFramework/Oli