Add background information about the assignment.
Add a .gitignore file to the repository
Loading the activity data
Unzip the activity.zip file so that the user doesn't need to do that.
Add histogram, mean and median for the total number of steps taken per day
Update the r markdown file with the average daily activity and imputing missing values
Update the r markdown file with plots of weekday and weekend
Also add the generated html and md file from knitr and its figures