Client enhancements to get crtime, file magic, and PE headers data

I used MSYS2 with MINGW to build libgnurx-0.dll and magic1.dll for Windows to be able to properly use python-magic.  The installer would also need to be modified to include the file magic database magic.mgc in the client installed directory.

I removed some packing detection and checksum comparison due to it having a pretty significant performance hit on larger binaries.  It may be worth it to enable those via options when a flow is run.

This also carves off the PKCS7 certs on PE files and returns them.  There might be better ways to do this.
Do you have an example file for that?  All the times I have run into foreign language version info it was a single version info structure with the original filename indicating things like cmd.exe.mui instead of cmd.exe.

The pefile module source seems to indicate a file only has one set, but I may have read that wrong.