Correct link to MACS LICENSE
<tr>
<td>License</td>
<td>
- <a href="https://github.com/pandas-dev/pandas/blob/master/LICENSE">
+ <a href="https://github.com/taoliu/MACS/blob/master/LICENSE">
<img src="https://img.shields.io/github/license/taoliu/MACS" alt="license" />
</a>
</td>
