Added css classes and ids to html markup

In this update

1. I have added the css classes and ids to html markup.
2. I also have added a css file for the styles in a css folder on the
frontside of the component. This css file at the moment contains the css
selectors for all of the pages. One only needs to fill the styles for
those selectors in order to give a new style to the component.
3. I have deleted a couple of files from both frontend and backend
folders as they were not needed.