Add MMM-S3Photos to documentation

[uphillcheddar]

i created a module to display photos from AWS's S3 i added a listener for your existing Notification("GPHOTO_UPLOAD", path); this should upload the photo to s3 for backup and also automatically add it to the display queue. the user just has to enable the option in my module via a config option thought i would call it out to you, feel free to close this issue out as there isnt really an issue with your end.

my code if you want to review https://github.com/uphillcheddar/MMM-S3Photos

config needed on my end to enable uploads:

{
    // rest of config options 


        selfieUploads: true,  // Whether to process and upload photos from MMM-Selfieshot
        selfieFolder: "selfie_folder" // S3 folder name for selfieshot uploads


    // rest of config options 
}