Add headers to schematic

[DanielHull]

No description provided.

[mlp6]

@aforbis-stokes can you confirm if this still needs to be done?

[aforbis-stokes]

I can't remember off-hand if this one happened, but whether or not it did, we will need to do some updating of the schematic with the pinch valve added in. Closing this issue and rolling into new "update schematics for system changes" issue makes sense. Can be assigned to me or @Graham-H-Miller

[mlp6]

How about if I create a new Milestone for this, and then specific Issues can be created as needed.

[aforbis-stokes]

Sounds good.