title: show "0" label on y-axis in lattice plot
body: <p>is there a comforable way to get labels for the upper and lower borders in the lattice y-axis? (without setting it concrete)</p>
  
  <pre><code>library(lattice)
  
  xyplot(decrease ~ treatment, OrchardSprays, ylim=c(0,200))
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/wzxIE.png" alt="enter image description here"></p>
  
  <p>supplementary question: can I set only the upper bound for ylim and take the default for the lower bound?</p>