rename ggstripes_station() to climatestripes_station().
climatogram_normal(). New function to plot a Walter & Lieth climatic diagram from normal climatology values.
climatogram_period(). New function to plot a Walter & Lieth climatic diagram for a specified time period.
ggwindrose(). New function to plot windrose diagram.
windrose_days(). New function to plot a windrose (speed/direction) diagram of a station over a days period.
windrose_period(). New function to plot a windrose (speed/direction) diagram of a station over a time period.