Add example apps somewhere

[raucao]

I think we should add at least one or two example apps that fulfill an actual purpose to the website. Obviously the first thought is Litewrite. Not sure what others could be at the moment.

[michielbdejong]

We can also link directly to https://unhosted-store.5apps.com/ once it's tested a bit more and I nicified the css a bit (which is also what I'll do on https://unhosted.org/apps/)

[untitaker]

https://wiki.remotestorage.io/Apps