Chapter 5 production polish (#78)

* starting work on ch5+6; categorical type change; remove commented out R code

* value counts, class name remap, replace in ch5

* remove warnings

* polished ch5+6 up to euclidean dist

* minor bugfix

* minor bugfix

* fixed worksheets link at end of chp

* fix minor section heading wording in Ch1

* added nsmallest + note; better chaining for dist comps; removed comments; fixed colors (not working yet)

* initial fit and predict polished; model spec -> model object

* polishing preprocessing

* balancing polished

* pipelines

* learning objs

* mute warnings in ch5

* restore cls2 to main branch

* Update classification1.md

add output scroll for large table

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* remove random state specificaiton from ch5

* fixed fill plots

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* better intro of meshgrid

* better warning filtering in chapters 4 and 5

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* remove np.number and replace with just 'number' in dtype selection

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* Update source/classification1.md

Co-authored-by: Joel Ostblom <[email protected]>

* properly gluing column names

Co-authored-by: Lindsey Heagy <[email protected]>
Co-authored-by: Joel Ostblom <[email protected]>