Most markdown processors support HTML content within a markdown document. Basically you could embed your markdown markup within a div which will centre its content. Following sample centers the image on the document. <div style=”text-align:center” markdown=”1″>  </div>
Category: Web
caniuse.com
http://caniuse.com/ is a very handy web site for web developers. It shows browser support for every HTML/CSS/JavaScript feature. Information is very detailed and shows current support level and estimated support level in future version of browsers. Partial supports are also shown with color codes.