Update zlib to version 1.2.7
Update unzip code to minizip 1.1

.. from zlib-1.2.7/contrib/minizip/
The original source was minizip 0.15beta from 1998.

This update brings zip64 support (untested) and cleaner code.

Furthermore, updates to future minizip should be much easier now, as
my changes to the original source files from minizip are quite small.

To make diffing to upstream minizip-src easier, I added the minizip
source as exceptions in the astyle-scripts and left them in their own
directory.

Two custom functions from idSoftware - unzSetCurrentFileInfoPosition()
and unzGetCurrentFileInfoPosition() - aren't needed anymore as
minizip 1.1 has functions that do the same.
Update zip code to minizip 1.1

.. from zlib-1.2.7/contrib/minizip/
It resides next to the unzip code in framework/minizip/

This updates makes the code a bit cleaner and creating zip64
with the idZipBuilder is now more feasible and update to future
minizip versions should be easier as I didn't change the original
files from minizip 1.1 very much.
Merge remote-tracking branch 'DanielGibson/update-zip'
Moved minizip contrib code to libs/zlib/minizip/