Added short usage instructions (#8017)
Added short usage instructions (#8017)

Added short usage instructions as per @bryevdv (#8011 comment: https://github.com/bokeh/bokeh/pull/8011#issuecomment-399509585)
jakirkham/bokeh,jakirkham/bokeh,timsnyder/bokeh,dennisobrien/bokeh,jakirkham/bokeh,timsnyder/bokeh,timsnyder/bokeh,mindriot101/bokeh,bokeh/bokeh,dennisobrien/bokeh,stonebig/bokeh,stonebig/bokeh,mindriot101/bokeh,bokeh/bokeh,dennisobrien/bokeh,ericmjl/bokeh,mindriot101/bokeh,bokeh/bokeh,ericmjl/bokeh,dennisobrien/bokeh,timsnyder/bokeh,dennisobrien/bokeh,stonebig/bokeh,ericmjl/bokeh,stonebig/bokeh,ericmjl/bokeh,mindriot101/bokeh,jakirkham/bokeh,jakirkham/bokeh,bokeh/bokeh,bokeh/bokeh,ericmjl/bokeh,timsnyder/bokeh