Checking in major new alpha release, version 0.2.0, with support for C GLtf 3D models, support for Data sources including animated CZML and GeoJSON (and GeoTopo), support for time-dependent properties (part of the CZML support), support for direct creation of Entity objects (run-time creation of the equivalent of CZML animated objects, but with full Java type-checking support), several new APIs needed to support these new features, more samples from Sandcastle, and a few bug fixes.