add unit test of operators for Complex
Remove user option file
Add ToString for display (Complex)
Add copy constructor of Complex
Add copy constructor
Cleanup oprators

Only static operator can be accessed from C#.
The arguments of these operators are handle.
operators with tracking reference were not needed if
  implicit conversion exists.
Add copy constructor for ComplexArray
Cleanup operators of ComplexArray


The combined operators (such as +=) does not support tracking refs.
(Not implimented)
Handle type is required for the combined ops.