Placement of timestamp on frame

[icr-ctl]

In some circumstances, we want the timestamp rendered onto the frame at the bottom of the image instead of the top. It would be good to have a parameter in the configuration file that allows us to select whether timestamp is on top of frame or bottom.

[iamgarcia]

It appears that Picamera's firmware provides no means of moving the annotation text, according to the documentation found here (Page 60, Section 5.12).