GAC_overlap.py description added to README
subs_avhrrgac.py: plotting routines removed; old subroutines regarding pystat ascii files disabled
plot_timeseries.py and plot_timeseries_linregress.py deleted because plot_pystat_results.py is able to plot all pystat results
subs_avhrrgac.py: new subroutines; minor changes
plot_pystat_results.py and subs_plot_sql.py (subroutines): visualization of pystat results