Bar Chart with hover text example.

- Add https://plot.ly/~etpinard/344/500/500/ to docs
- Make PR https://github.com/plotly/documentation/pull/6 obsolete
- (??) geom_histogram and gg-alpha have been published successfully
@chriddyp, I'm pretty sure i added this. perhaps this is the first time that it's been run, so we're seeing some weird stuff in there?

https://github.com/plotly/documentation/blob/master/publish.py#L345