Previously,
* Equals performs IEEE 754 equality check for floating points and
byte-to-byte checks for other types, including references.
* Ieee754Equals performs IEEE 754 for primitive types
* TotalOrderEquals performs total order equals to all types, including
floating points.
Now it is simplified,
* Equals performs total order checks for all types.
* Ieee754Equals performs IEEE 754 for primitive types.
* (TotalOrderEquals is removed.)
Jinseong Jeon