minor cleanup, diagram orientation, rm svg/

The power supply diagram has been re-oriented
so it will be right side up when the landscape has
the right side of the page.  Previously it was
the opposite.

Moved a power supply line in the control diagram
outside of its control group so it was clear that
it comes from somewhere else.

Removed svg/ which contained the out of date
Inkscape diagrams.
driver schematic with multiple valves

The driver schematic has been expanded to show
how multiple valves are connected instead of
just one.
Merge branch 'master' into build
new doc build