Added loads of units in nearly all graphs.

Overhauled fig_invariance_full.pdf.
Added some legends, somewhere.

python/fig_invariance_thresh-lp_appendix.py

@@ -9,7 +9,7 @@ from misc_functions import shorten_species
 from IPython import embed
 
 # GENERAL SETTINGS:
-mode = ['pure', 'noise'][1]
+mode = ['pure', 'noise'][0]
 target_species = [
     'Chorthippus_biguttulus',
     'Chorthippus_mollis',