Fixing seg faults on f(stemming) and g(async invoke) examples:
1. Stemming was failing because there was a typo in the finish function that used i instead of t to populate the JavaScript array, this resulted in a, predictable, seg fault, as results were being accessed that didn't exist.
2. Async invoke is a little more complex. I think that the problem had to do with the fact that since SpellDictionary inherits from nodeObect, which inherits from v8, that SpellDictionary can't be created off the main event loop that v8 belongs to. The global lock should complain if this happens, but by istantiating the Hunspell object off thread and creating a new SpellDictionary contructor that simply accepts the Hunspell object I seemed to fix the issue.