Thanks for this post! It will be very useful for me. FYI, you got me curious and I did some experimenting after you posted and observed that it also works in the markdown editor and it works with text as well as images. Very cool!
Example:
Right side
Left side
Example Syntax:
<div class=pull-right>Right side</div>
<div class=pull-left>Left side</div>
<center>Centered</center>
<p><br></p>
<div class=pull-right>https://steemitimages.com/0x0/https://s15.postimg.org/o64jdir3v/easter-1237585_1920.jpg</div>
<p><br></p>
The quick brown fox jumped over the lazy dog.
<p><br><br><br><br><br><br></p>