Add 6 script plotting files
- /script/GibsonEtAl/Plotting Scripts/Figure 6 (upper line)
- /script/GibsonEtAl/Plotting Scripts/Figure 6 (lower line)
- /script/GibsonEtAl/Plotting Scripts/Figure 7 (with zippering)
- /script/GibsonEtAl/Plotting Scripts/Figure 7 (without zippering)
- /script/GibsonEtAl/Plotting Scripts/Figure 8 (with severing- different density)
- /script/GibsonEtAl/Plotting Scripts/Figure 8 (with severing- same density)