Allow variables to be of any type
fixup javascript dta provider (catch exceptions)
New widget: <$for/>
New widget: <$script/>
Improve widget <$setvariable/>
Typo fix in code for widget <$transclude/>
Add new formats for the <$view/> widget
Widget prototype: evalExpr() to eval javascript expression (required for <$view/> and <$for/>)
doc for $setvariable
Add TimeTracker example