title: what's the point of having a jquery-rails
body: <p>So I installed Ruby on Rails(first time) and got down to starting a new project and a server. So as expected there was an error on running the Rails server command. Some gems needed to be installed, apparently. The bundle install command didn't work for some wierd ssl issue. So I decided to do it all 
  manually. </p>
  
  <p>What strikes me as odd is that there's a gem for jQuery: jquery-rails. I don't understand the point of this, really. Why not simply download the jquery file and put it in public.
  What's the point of having a gem here. 
  Is it simply convinience or is there another important reason behind it?</p>