Update index.html
Update index.html

Added back the link to the sources
niczero/strapdown,devinshields/strapdown,yieme/strapdown,devinshields/strapdown,devinshields/strapdown,ndossougbe/strapdown,ndossougbe/strapdown,niczero/strapdown,niczero/strapdown,ndossougbe/strapdown,yieme/strapdown