title: Update browser's URL hash id/anchor on scrolling with Skrollr
body: <p>So your page consists of sections, each section has a unique id or anchor and you would like browser's URL update with current section's id/anchor as you scroll.</p>
  
  <p>PS I'm not asking a question but rather sharing a recipe. All relevant code examples and demo are in the answer, so please don't vote against this question.</p>