added control strain, added path plot for 100 to 160s

[quintinm-dev]

• fixed control strain for all plots so it's actually plotted first, no longer mislabelled
• changed path plot to use facet_grid to make separate graphs by strain and timeperiod, instead of my previous implementation -> no longer need gridExtra package
• added file for deprecated code in an attempt to make "column_identification.R" shorter..