new: new internal structure for everything
chg: port all builtins except PackageGraph to new kernel
add: primitive Symbolics, Subst() and Clone()
chg: move EvaluateTo* Helpers
add: function AbsoluteTime()
chg: port over graphical UI and Graphing Packages
fix: memory leak when freeing registered operators, long list output
chg: define interfaces for Call and SymbolRef to make comparison easier
chg: move value interface declarations around
add: basic unit support, no algebra yet
fix: errors in conversion factors
add: algebra for dimensioned quantities
chg: Values compute themselves
new: documentation HTML autogenerated from simplified XML form of function descriptions

* uses: saxon9he.jar for XInclude and XSLT; php for cleanup
* ported function description and updated to new functions (thanks FinnO!)
fix: functions behave as documented
chg: some cleanup for Root
add: express a unit in another unit
fix: documentation
add: Trunc(), Ceil(), Floor()
chg: new unit selection algorithm for express(), finds simpler/more sensible solutions (thanks Hidden!)
add: new units, include arc (base: radian)