title: Unable to set bokeh plotting parameters using BOKEH + HOLOVIEW plotting option via Python
body: <p>Is there any documentation specifying how to pass Bokeh parameters via holoview?
  I am reading the tutorials but I think there is something small I have missed.
  There is an example online which describes this in Ipython but I am trying to do it via a python WITHOUT Ipython notebook.
  <a href="http://holoviews.org/Tutorials/Bokeh_Backend.html?highlight=bokeh" rel="nofollow noreferrer">http://holoviews.org/Tutorials/Bokeh_Backend.html?highlight=bokeh</a></p>
  
  <p>When I run this program I get the curves but the color does not change and I also get this error: WARNING:root:Curve01537: Setting non-parameter attribute style={'line_color': 'green'} using a mechanism intended only for parameters</p>
  
  <p>How can we set the parameter?</p>
  
  <pre><code>    Code Example here
      from pprint import pprint, pformat
      import holoviews as hv
      import numpy as np
      import pathlib, os
      import webbrowser
      import lasio, las
      from holoviews import Store
      from holoviews.plotting.bokeh.element import (line_properties, fill_properties, text_properties)
  
     def plot_bokeh(plot):
  
         #Create renderer instance
         myrenderer = hv.Store.renderers['bokeh'].instance(fig='html')
         out_file_name = "".join(["./OUTPUT/","gyro", "_graph.html"])
         with open (out_file_name, 'w') as f:
         #Plot static html
             f.write (myrenderer.static_html(plot))
         f.close()
                       webbrowser.open_new_tab(pathlib.Path(os.path.abspath(out_file_name)).as_uri())
  
  
      def holoview_sandbox():
  
  
        curve_opts = dict(line_color='green')
        xs = np.linspace(0, np.pi*4, 100)
        data = (xs, np.sin(xs))
  
  
        holo_plot = hv.Curve(data, label='MY LABEL' , style=curve_opts) 
        plot_bokeh(holo_plot)
  
      if __name__ == '__main__':
          holoview_sandbox()
  </code></pre>