Add Cafe Demo Site #3

[Siebes]

Ive done some tweaking with Priya's PR and I should now have a 6.2,6.3,6.4 package.

I had to remove some references to components in we-retail because they arnt installed by default on 6.2

I also changed the pictures to all come from unsplash due to licence concerns

Had a bunch of problems with 6.2 and trying to use the foundation page so I had to override body.html

[mickleroy]

Apologies for the very delayed review on this. I'm happy to merge but I have a couple of comments:

• /etc/clientlibs is generally used for core AEM libraries. Instead it's preferable place everything in /apps and expose them using allowProxy
• the layouting mode doesn't seem to work when adjusting element sizes. You're probably missing the grid.less which provides the aem-GridColumn classes
• I would recommend changing the package of the Sling models to be com.shinesolutions.helloworld.models instead of com.shinesolutions.models