[OSM-dev] Wiki: Renaming the API pages

[Lars Francke]

> +1
> This has needed a tidyup for a long time.

I'm done with this change.
I have renamed every relevant page to "API v0.x" and "API changes
between v0.x and v0.y" and I tried to correct every link to point to
the new name. I might have missed some references but...it should
work, because the old names forward to the new names.

In my opinion this looks much cleaner now:
http://wiki.openstreetmap.org/wiki/API

Cheers,
Lars