Add "$$" context to Native docs
Add "$$" context to Native docs

Since global variables aren't accounted for in yard, add some
extra context to the top level `Native` docs.

jgaskins/opal,iliabylich/opal,kachick/opal,opal/opal,Mogztter/opal,opal/opal,jgaskins/opal,iliabylich/opal,Mogztter/opal,jgaskins/opal,kachick/opal,kachick/opal,kachick/opal,opal/opal,Mogztter/opal,iliabylich/opal,opal/opal,Mogztter/opal