Sample Project

This PR is for discussion only do not merge :x: 

Here is the sample application showcasing usage of all features present in the previous PRs.
This is temporary, this is because the project module is not released yet, it is only done to make this sample work. As soon as the previous PRs are merged and the project module is released I'll update to used latest version (similar to the live above). This PR is not going to be merged as is, I'm only opening it as a platform for discussion for people from the RxAndroid to look at while we get the rest in.