Update Electrophoresis doc.

[griswaldbrooks]

https://github.com/cclrobotics/lhr-docs/tree/master/System-Diagrams/Electophoresis-System

Needs pictures, diagrams, part numbers, and to check the viable input voltage range for the DC-DC Converter.

[ZenSpiders]

I found all the relevant information at http://www.instructables.com/id/Gel-electrophoresis-system-mini/
will be adding it in today