Made changes so the only the resource that changed is refreshed (was causing the whole workspace to rebuild).
Added RascalNavigator class to handle save/restore of opened items in
the navigator.
HtmlDisplay containing also the routine: drawBarChart.
htmlDisplay(location, html)
htmlDisplay(location) 
For an example, see  rascal://analysis/statistics/BarChart
removed some superfluous casts
Merge branch 'master' of https://github.com/cwi-swat/rascal-eclipse.git
Merge remote-tracking branch 'upstream/master'