Change examples to za-peoples-assembly 

Replace kenyan-politicians examples with za-peoples-assembly ones.

I also removed the note on the URL potentially 404ing if the data has reloaded, as that seemed more of an issue for auto-generated IDs than pre-constructed ones.
The API now returns membership information

Update the example JSON responses to show the membership information that is now included.
Remove quoting of slashes

Some links had needless \/s