Add stepperControl API
run file changed for testing
Merge branch 'plot' into stepper
Merge branch 'analysis' into stepper
Remove unnecessary imports and reorganize imports
Refactor import Stepper to Phidgets_Stepper

For naming convention within project
Refactor stepper motor API naming to phidgets API

For future convenience if more phidgets devices types are introduced
Refactor class name to stepper

For matching naming convention
Remove all functions for API rebuild

For threading implementation
Merge branch 'stepper'