First commit of the modelioscriptor module
CoExplorer startup improved with message

Added the dependency to modelioscriptor
Better support for module reloading
first support for html "metamodel" and "javadoc" browsing

#      - support for "metamodel" and "javadoc" browsing
#      - explore(element,browser=True)
Small enhancement of HtmlWindow and TreeWindow

HtmlWindow : added setLabel
TreeWindow : added onSelectionFun