lazyImgContainer confusing

[silberjan]

plase note that the attribute to add to a container on a dynamic page is lazy-img-container (in kebab case) rather than the actual name lazyImgContainer (in camel case)

Even though this is convention in Angular, it still got me ;)

[canova]

I'm not so experienced in angular and this got me too :)

[smcauliffe]

thanks for that!

[salilbajaj]

Can you write the sample code on how to use lazy-img-container

[Pentiado]

I updated readme and added demo/container-demo.html that shows how to use it so problem fixed : )