Adding limit to history

[cosmicChild1987]

Allows you to pass an optional limit to the history call, with a default of 20 (Current default) if it is not changed

[dgreif]

@cosmicChild1987 this repo is no longer being maintained. You can take a look at my api over at https://github.com/dgreif/ring. Each camera has a getHistory(limit = 10, favoritesOnly = false) method that you can use to get limited history. Let me know if you have any questions!