Ogr view model

Added an ogrItemViewModel that forwards files to our ogr2ogr service for conversion.
On drag and drop the file is uploaded to the server on a url it is loaded by the server.
Made this the default fall through for formats we don't have explicit handlers for.
Put 1MB size constraints on server and client side
Added airports.zip (shape file) to our init_test.json list

Is there a way to catch it so that it doesn't actually return a valid OgrItemViewModel in the IE9 case? That would allow it to to fail before people are asked if they want to do this.

Interestingly it's been this way since we shipped.  Looks like it's not a big feature with those users.