Main change:
New version plot Differences in activity patterns between weekdays and weekends.png

Changes to be committed:
	modified:   PA1_template.Rmd
	modified:   PA1_template.html
	modified:   PA1_template.md
	modified:   README.md
	modified:   figure/Differences in activity patterns between weekdays and weekends.png
	modified:   figure/daily activity pattern.png