Release Stable 4.1.0

Added:

• create_table - System tables, only created by root
• UserManager\AddPermission()
• UserManager\CheckPermission()
• UserManager\GetRole()
• UserManager\RemovePermission()

Bugs fixed:

• TableManager\DeleteTable() - not deleting the table file
• check_permission - using wrong parameters on UserManager->CheckPermission()
• delete_user - using wrong parameters on UserManager->CheckUser()
• eval - not running the function
• get_table_data - returning null and an invalid JSON
• get_permissions_raw - returning an invalid JSON