1. This commit includes some changes to hunspell classes to clean up the code and use a more c++ memory allocation convention than using the stdlib malloc.
2. inluded libraries that were no longer needed were removed.
3. The readme was updated to include a not about how to create custom dictionaries.
4. A test was added to show the work that is needed to make nodehun more thread safe, etc
5. package.json updated to reflect new changes.