Add docs examples for nested pluck
Adds examples with return_vals flag.
Adds multi get `get_all` syntax.
Change the signature for pluck.
Merge branch 'next' into merge_br

Conflicts:
	docs/rql/src/jsonobject.yaml
	docs/rql/src/select.yaml
Update get_all syntax for py.
Whatever.
Remove upsert flags.
Merge branch 'next' into merge_br