title: Cartopy behavior when plotting projected data
body: <p>I am using cartopy to draw my maps. Its a great tool!
  For some of my data I have the problem that the data is not properly mapped around 0deg or the dateline. See the example below.</p>
  
  <p>I know the same feature from matplotlib.basemap, where it can be solved by using the add_cyclic routine. I wondered if somebody can recommend how to best fix this problem in cartopy.</p>
  
  <p>Thanks!</p>
  
  <p>Alex</p>
  
  <p><img src="https://i.stack.imgur.com/UlXmz.png" alt="Cartopy problem"></p>