title: How do I get (fetch) the lon and lat for a given address in R
body: <p>I'm handling object data in R with additional geo-information like street-name, street-number, postal-code and city from Germany. 
  I want to use a function to fetch the lon and lat info for the specific adress and update my dataframe. 
  With the lon and lat for each opbject from that dataframe I'm generating a geom_point in a qmap.</p>
  
  <p>Any help or information for a possible solution in R or where to look up for more information is welcome.
  Sebastian</p>