Create InitialiseMap_demo4.js

Demo using Open Layers, GeoExt and ExtJS to show a basic web map with toolbar, table of contents and geocode search.  Includes the following:

- Toolbar incorporating pan, navigation, zoom box, draw, print and dynamic measure (http://github.com/jorix/OL-DynamicMeasure).
- Tooltips on hover for Cities and World Heritage Sites.
- Popup window on click for Cities and World Heritage Sites.
- Animated clustering of volcanoes (uses http://github.com/acanimal/AnimatedCluster).
- Accordion table of contents.