Nested tag in header tags

[Bluezen]

Phrase emphasis or links are not parsed correctly when nested in headers.
For exemple:

# [Click](http://test.com)

will be rendered in HTML as:

<h1>[Click](<a href="http://test.com">http://test.com</a>)</h1>

instead of:

<h1><a href="http://test.com">Click</a></h1>

or

# **Bold**

as

<h1>**Bold**</h1>

instead of

<h1><strong>Bold</strong></h1>