Revert "CAR-100: Upgrade to .NET 4.0 instead of 3.5 -- SharpZipLib patches: Adding copyright notice, normalizing to unix line endings"

This reverts commit 1298fb0992caf489840013ed93d1b9a5d2eabf34.
CAR-100: Upgrade to .NET 4.0 instead of 3.5 -- SharpZipLib patches: Adding copyright notice

Signed-off-by: Gabor Apati-Nagy <gabor.apati-nagy@citrix.com>