title: python Bokeh histogram: adjusting x scale and chart style
body: <p>I have a Histogram in python using Bokeh:</p>
  
  <pre><code>from bokeh.charts import Histogram
  from bokeh.sampledata.autompg import autompg as df
  #from bokeh.charts import defaults, vplot, hplot, show, output_file
  
  p = Histogram(df, values='hp', color='cyl',
                title="HP Distribution (color grouped by CYL)",
                legend='top_right')
  output_notebook()  ## output inline
  
  show(p)
  </code></pre>
  
  <p>I would like to adjust the following:
  - X scale change to log10
  - Instead of bars, I would like a smoothed line (like a distribution plot)</p>
  
  <p>Does anyone know how to make these adjustments?</p>