primitive parseOsmXmlFromUrl()
Merge pull request #1 from ubergesundheit/master

Thank's for the patch :) I'm putting your changes into the head revision... but before releasing it I will do some modifications:
* I will extend the xmlParser.parse(...) function so it will accept filePath or url arguments.
* I will move the URL fetching from main.js into xmlParser so the SAX parser can process parts of the http response before the whole XML is retrieved.