Commented Issue: [FIXED] Memory leak with shared V8 runtimes [107]

Repeated calls to `V8Runtime.CreateScriptEngine` make the runtime's heap grow even if the engine instances are disposed immediately. This is because the `V8ContextImpl` destructor neglects to to dispose the termination exception.
Comments: Fix posted [here](https://clearscript.codeplex.com/SourceControl/changeset/41036a3cb82a71fc009664ccc9609767bead5aea).