Amber model and Modelica tutorial

The two most interesting point Mingkun picked up from CyPhy workshop are the mathematical model of Amber robot and the way how tutorials of Modelica are presented. Amber model illustrates how simple the model could become once the most significant parts of the problem are identified. However, the performance of simulation is limited by the poor symbolic computation ability, which demands quick improving. Despite of the issue of platform-dependent, the process of following tutorials of Modelica is very enjoying. Users can get immediate feedback from this.