Markdown syntax features for Italics and Bold

[gulyapulya]

My intention is to implement additional syntax features for the markdown files such as italics and bold. They should be transformed into html properly.

Solution:
In markdown, *sample text* or _sample text_ are used to display the sample text in italics and **sample text** or __sample text__ are used to display the sample text in bold. For html, they have to be transformed into <i> and <b> elements.