adf
Update README.md

Added link to gh-branch website
files needed for images slideshow uploaded
add image links to PointsofInterest.js
changes made in markers.js for slideshow
add slideshow modal to index.html
add div for texts for image
slideshow modal window position
use default settings for slideshow modal window position
For the slideshow, more work need to do to change image links dynamically in markers.js.
change image links dynamically in markers.js will come later