Interactive plot from Code/Astro project

To run the bokeh plot, cd into the bokeh_code directory and run: `bokeh serve --show multiplots.py'

To-do list:

• Age slider [HPO - DONE]
• Plain English description of column headers from MIST [TBD]
• Luminosity class in plain english ("white dwarf", etc) [PP]
• Create stand-alone plot of spectrum of stellar atmosphere from MIST in bokeh [AV]
• Integrate spectrum plot into bokeh server [HPO]
• Create stand-alone plot of stellar internal structures (concentric circles) in bokeh [PP]
• Integrate interior into bokeh server [HPO]
• Add synthetic photometry and colours in MIST [AV]
• Convert luminosity to bolometric absolute magnitude (as data column header) [HPO - DONE]