AES unzip support using https://github.com/nmoinvaz/minizip

I needed to unzip AES archives for a project that I am working at the moment, and since SSZiparchive does not currently support AES I looked at adding it.

This fork of minizip has AES zip and unzip support along with some other improvements
```
https://github.com/nmoinvaz/minizip
```

Initially I could not get it to compile under so I forked it
```
https://github.com/DaleJefferson/minizip
```
And made a couple of changes which I hope to get merged back.

The zipping code has a dependency on a windows library but the unzipping works on iOS.
It really needs porting to use CommonCrypto.

If you are interested in merging this fork let me know otherwise I will maintain it for my project.

Thanks for the great library

Dale