Plotting arrival Flights

Working on plotting the properly grouped data on the same figure.
Exercise 3 plot

Am now able to plot the correct graph for a single airport. also
cleaned up some commented code
Exercise 3 two plots

I am now able to plot multiple data frames on the same plot for the
different airports. Currently fixing an issue that prevents processing
of rows with date fields which do not contain date time objects.
Exercise 3

Completed logic behind plotting all 3 airports. MAG airport is not
visible because the data is significantly smaller than MAD and BCN.
Working on issue with index when inputing the full file.