No changes to the Base-64 behaviour, but the (C++) interface has been
expanded and improved:

    b64 core:
        + b64_getErrorString() and b64_getErrorStringLength()

    b64/C++:
        - deprecated b64/cpp/b64.hpp
        + b64/b64.hpp
        ~ all public C++ names moved from b64::cpp namespace
          into b64 namespace; old namespace retained for
          backwards compatibility
        ~ fix to b64::decode() to avoiding invoking subscript
          operator for empty blob_t instances


Download from http://synesis.com.au/software/b64.html