v0.0.9 - Relay support

Lots of new fixes and changes.

• The panel now supports using two of the SainSMART relays currently connected. The "Test Device" tab is now "Test Device + Relay" tab and includes a relay control section where you can specifically select the relay ports to open. The labels are set so that checking "1" or "2" on both the source and drain tabs will open the correct device.
• Added an "auto-set relay" and "manual mode" to Test Device tab. Auto-set relay uses the dropdown to automatically turn on the specified relay ports. The manual mode just runs the test device and assumes either the user has set up the relay correctly or is manually measuring the
• Changed step size so it's always the correct direction even if you forget a negative sign
• Fixed the transient plotting x-axis for multiple cycle plotting
• Changed the dimension labels to match those in our lab from the new mask (10 um length)

To do:

• Have the individual output and transfer curve also control the relay. Currently it throws an instrument communication conflict, so for now you need to go to "Test Device + Relay" now