Allow multiple expanding parameters.
Consts: INVALID_PARAMETER_COUNT -> DYNAMIC_PARAMETER_COUNT
Use sysCall instead of instruction to expand parameters on the stack.
RuntimeInternals: Allow sysCalls to access the stack.
NumberRef removed.
SVN updates.
Instruction&RtValue: Added static_assert for assuring union type.
RtValue:
 - RtValue is a class now.
 - data members are private.
 - access methods added.
cleanups.
Allow constructors of (Ext-)ReferenceObject to pass its parameters to the wrapped object's constructor.
Member functions of Number require all parameters to be convertible to Number now.
ObjRef: .toDbgString() added.
Several conversion methods added.
Cleanups.