Single file copies of our GeoJSON examples are now rendered nicely on Github

I simply renamed the .js single file copies of the I-D submission candidates GeoJSON examples into .geojson files, so that we all have a taste of the new GeoJSON awsomeness when we browse the js folder in our github repo.

Kudos from me to Tim for reminding me once again, how cool git (and hg are) and how deep the viral patterns of svn induced branch laziness really invaded my brain ;-)

Hope you like it. Don't expect all samples to cause stunning display effects. Some may even result in a cannot render message.

All the best,
Stefan.