choosel：对GWT数据可视化框架

As of July 2012, the development of Choosel has been discontinued Choosel is an extensible, modular GWT framework for web-based visualizations that are composed of multiple views. It is available under the Apache License 2.0. There are three main use cases for Choosel: (Domain-specific) visual data exploration workbenches (example) that empower domain experts to visually explore, analyze and understand data from their domain. For example, Bio-Mixer helps biomedical researchers in exploring bio-medical ontologies and in understanding how concepts from different ontologies are related. Interactive infographics and telling stories with data (example) using multiple coordinated views. For example, u