Add `viewModels` function

[tcrombie]

2. Use viewModels from GWA cleaning -
   1. User can set variables for grouping
   2. function cals quantiles
   3. Choose user set number of wells per group to display for lowest levels
   4. Plot those using plotArray function in GWA cleaning
   5. coolor by std=. GWA
   6. Possibly just let the user filter data to what they want
      1. then use standard object labelling
3. To appy what user learns from the view array they will use the
4. Make a report with:
   1. Amanda’s model / size plots