Placeholder for data directory
Download, read and subset the data
Complete plot1
Add a data file containing only used records (as placeholder for the data in the repository)

Written using:

write.table(x = power, file = "./data/household_power_consumption.txt",
            quote = FALSE, sep = ";", dec = ".", row.names = FALSE)
Copy plot1.R to create templates for plots 2--4.
Use transparent background for all plots
Complete plot 2
Complete plot3
Complete plot4
Add small data file to zip containing only used records (as placeholder for the data in the repository)