More sensible creation of BaseCamera class properties

class BaseCamera(object):

    thread = None  # Background thread that reads frames from camera

    camera = None  # Camera object, for direct access to camera

    frame = None  # Current frame is stored here by background thread

    last_access = 0  # Time of last client access to the camera

    event = CameraEvent()

    # CONTEXT MANAGER AND OBJECT CLEANUP

    def __init__(self):

        """Base implementation of StreamingCamera."""

        self.thread = None  # Background thread that reads frames from camera

        self.camera = None  # Camera object, for direct access to camera

        self.frame = None  # Current frame is stored here by background thread

        self.last_access = 0  # Time of last client access to the camera

        self.event = CameraEvent()

        self.state = {}  # Create dict for capture state

        self.settings = {}  # Create dict to store settings