Also fixed Go unit tests not being up to date with recent schema
changes.
Change-Id: I42e619f9c5ea05f6f937c68a5c8a92462c46bce3
Tested: on Linux and Windows.
Also made the C# implementation support unsigned types, and
made it more like the Java version.
Bug: 17359988
Change-Id: If5305c08cd5c97f35426639516ce05e53bbec36c
Tested: on Linux and Windows.