Revert "Back ZipEntry.DateTime with a real DateTime field instead of DosTime"
Revert "Back ZipEntry.DateTime with a real DateTime field instead of DosTime"

This reverts commit 51605f87f53abd62953cc9b86b0c8c35e231dd61.

The Zip file format stores date and time in a single 32 bit integer, based on the format used by MS-DOS. Adding accuracy by using a DateTime object won't necessarily result in an accurate date and time.
See http://stackoverflow.com/questions/3725662/what-is-the-earliest-timestamp-value-that-is-supported-in-zip-file-format for further information.

# Conflicts:
#	ICSharpCode.SharpZipLib/Zip/ZipEntry.cs

McNeight/SharpZipLib