Implement multi-ocular support, add biblical example

This removes the assumption that an xeyes instance displays just a pair of eyes, and instead allows future developers to implement different kinds of ocular layouts.

Currently, the ocular layout system only allows for specifying offsets, but a future change might also make different parts of the eye geometry configurable: size of different elements, padding, etc.

Signed-off-by: Serge Bazanski q3k@q3k.org