add temporary fix for 'r' code. (see notes below)

the convention was set as this:

`p <- plotly(...)`

for r, but was changed to this:

`py <-plotly(...)`

streambed translator doesn't reflect this yet, so we need to put
a line to catch the older version of this sign-in.
update auto-generated docs for 'r'.
removed 'using Plotly' from julia sign_in (missed in refactor)
updated julia examples with `python run.py process julia`
test-publish updates for r and julia