Provide script to convert CSV -> Geojson

Converted `city-of-philadelphia/locations.csv` to `city-of-philadelphia/locations.geojson` to allow for native mapping.

Created `script/parse` to convert the CSV directly to geojson with no modification. Here's [the result](https://github.com/benbalter/flu-shot-spec/blob/geojson/city-of-philadelphia/locations.geojson):

![screen shot 2013-10-05 at 11 18 21 am](https://f.cloud.github.com/assets/282759/1274836/66acafa4-2dd1-11e3-892a-97560b9e73bb.png)