moved start button up to improve usablilty on small screens, also renamed Tkinter module to Tk per standard
moved start button up to improve usablilty on small screens, also renamed Tkinter module to Tk per standard

computationalEpidemiology/biobankAccelerometerAnalysis,computationalEpidemiology/biobankAccelerometerAnalysis,aidendoherty/biobankAccelerometerAnalysis,aidendoherty/biobankAccelerometerAnalysis