widget-jsmol version 1.0

This is the first release version for the widget-jsmol. There are some limitations in this widget.

1. The Jsmol libray was not wrapped by the widget. It needs internet to fetch Jsmol.
2. The way to load files (structure, cube and etc.) is not good enough.
3. There should be more APIs for the visualizer.

We are not planning to make further development for this widget. But pull requests are very welcome.