Create run_gui.pl
Create survivor_function.pl

Initial upload of perl script, survivor_function.pl. This script is called by perl GUI, run_GUI.pl, and in turn, executes tephra2 with parameters selected through the GUI. Plotting is initiated with an additional perl script, survivor_plot.gmt.pl. This script uses the Generic Mapping Tools (GMT4) suite of programs.
Create survivor_plot.gmt.pl

This perl plotting script uses GMT version 4 to plot survivor curves for various locations based on multiple runs of the tephra dispersion model, tephra2. It is called by the perl script survivor_function.pl.
Update README.md
Merge pull request #1 from ljc-geo/tephra2probability

probability scripts