* fix t/leak.t
* _numify() creates an NV, this is not good when we use 64bit integers
and do not have long doubles.
* put _str() into XS
* put _add()/_sub() into XS
* put all the other routines into XS
* fix t/leak.t
* _numify() creates an NV, this is not good when we use 64bit integers
and do not have long doubles.
* put _str() into XS
* put _add()/_sub() into XS
* put all the other routines into XS