Update settings to accomodate CF mongo creds
Update settings to accomodate CF mongo creds

With the removal of MongoLabs (mlab) from the Bluemix catalog, the only free service instance available is the CF mongo service.  The generated credentials provide a key named "url" vs. "uri" that requires update.  I've also broadened the regex to be more permissive by matching all non-alphanumerics using \W and alphanumerics using \w  vs. outlining explicitly the allowed non-alphanumeric characters within username, password and database fields.
ibmjstart/bluemix-python-eve-sample,joshisa/mistub,joshisa/mistub,ibmjstart/bluemix-python-eve-sample,ibmjstart/bluemix-python-eve-sample,joshisa/mistub