HTML Cleanup

Things changed:

1. Site changed from XHTML Transitional to HTML5
    * Removed some forward-slash `/` in some elements -- `< />` to `< >`
    * Unsupported tags effecting site's style have been removed and respective code is done with CSS

2. `jquery.min.js` is loaded before `boostrap.min.js` as bootstrap required jquery.

3. `jquery-ui.css` and `jquery-ui.min.js` have been removed as they aren't used so far in the site.

This site currently shows 5 errors for validation - Those probably can be ignored. We need to segregate all `<style></style>` blocks and drop inside `<head></head>`

*Minor errors still showing:*

1. In `layout.html` > `<link rel="top" ..>` There is no in-built keyword as `top`
2. `Element style is missing required attribute scoped` -- as mentioned above, all `<style>` should be moved into `<head>` but this shouldn't be a problem! (Just a note)