Added Pictures of ST4 Modification

This mod allows you to add ST4 capabilities to AstroEQ. It requires the
latest firmware to work.
Added ST4 Modification Photos

This simple mod gives AstroEQ full support for ST4 guiding. The latest
firmware revision is required.
Revert "Added ST4 Modification Photos"

This reverts commit 5ff80419e1aad65ce45cfe5e5fac4273a9d7c799.