Inline links misparsed if surrounded by angle brackets

Links in the form

```markdown
[Test](<http://example.org>)
```

That should be rendered as:

```html
<p><a href="http://example.org">Test</a></p>
```

Get rendered instead as:

```html
<p><a href="http://example.org">Test<a href="http://example.org">http://example.org</a></a></p>
```

See #138 for a minimal testcase