Fixed multiple memory leak issues. All memory leak issues are related to use of v8::Persistent<T>. Reset() was never called on a Persistent variables.
Fixed multiple memory leak issues. All memory leak issues are related to
use of v8::Persistent<T>. Reset() was never called on a Persistent
variables.

Leaks prevented callbacks and result sets from destruction.

sqlanywhere/node-sqlanywhere,sqlanywhere/node-sqlanywhere,sqlanywhere/node-sqlanywhere,sqlanywhere/node-sqlanywhere