Infrastructure for overlaying data; plot with Scragg data
Rescaled colour range, grey hatching
Finer mesh
Merge branch 'feature/Scragg2011_model' into develop

# By Adam Jackson (2) and ajjackson (1)
* feature/Scragg2011_model:
  Finer mesh
  Rescaled colour range, grey hatching
  Infrastructure for overlaying data; plot with Scragg data
update README, .gitignore. Tidy plot files.