View/Frontend improvements

[mistylavender]

• [x] Gray Scale for all the images on about us page with button:
  • Natasha: commit blurb
• [x] Frontend help for model improvements: function for watermark and greyscale (- an image_info object (ii) has-an image file, has-a list of image_property objects (contains original info, original info with watermark, grey, grey with watermark, etc))
• Kira: commit