Adding point sensitivity analysis to radviz.

changing the destroy R process function in Rservice from private to
public so that it can be called from a client...
Merge branch 'master' into fkamayou
workaround for voronoi bug
added option to probe for annuli
added sqlParams option to setWeaveColumnId()
changed quotes
escaping characters for xml encoding
updated documentation
updated debugging code
URLRequestUtils: Async responders are now assigned as busy tasks rather
than the url loader.  This fixes the bug where busy status would not be
correctly reported when getContent() was used.
updated documentation
show close button on equation editor
fixed bugs where scatterplot initial state would be changed by editor.
Added bulkQueryService()
updated documentation.
now preventing infinite servlet request loop on failure
Added word wrap option to session editor.
drawInvisiblePolygon() now has default coords for a rectangle.
drawInvisiblePolygon now does lineTo() back to the first coord and does
not modify the coords array.
fixed bug where hierarchy wouldn't load.