title: How to add my custom css class to a html element
body: <p>I am new to Social Engine. Part of the HTML seems to come from the modules/views directory and part of it seems to be generated on the run. </p>
  
  <p>I did look into creating new theme, it allows to write new styles of the existing CSS classes. Is that all that is possible?. I also hear it allows to add new html through creating widgets but if I write a new CSS class how do I add it to an existing html element? (because I see some CSS classes are used on different pages so the style I write for a class to suit one page doesn't give what I require on another ). </p>