title: R package dev: re-export all instead of depends?
body: <p>While developing R package I would like to avoid <em>Depends</em> in favour of <em>Imports</em>.<br>
  What would be the differences if instead of using <em>Depends</em> I will <em>Imports</em> a package and re-export all it's exported functions?  </p>
  
  <p>Do I need explicitly call it's internal <code>.onLoad()</code> etc. to have it initiated more like <em>Depends</em>?</p>