Add meta files

version 1.1.0

Update csproj for v1.0.0 stable (icsharpcode#259)

Update ICSharpCode.SharpZipLib.csproj (icsharpcode#256)

Merge PR icsharpcode#247, Update Nuget package for v1.0-rc1

* Remove Directory.build.props
* Move Nuget settings to .csproj and update versions
* Fix repository URL, license URL and update copyright year.