Install LICENSE to simplify complying with the license

[neverpanic]

The MIT licensed used by your projects requires package managers to distribute the LICENSE file when re-distributing your package:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

Please consider making this easier for all package managers out there by installing the file in an appropriate location (such as $prefix/share/doc/MobileDevice) automatically. I'm sure setuptools/distutils have a way to do this properly.