ErrorHandling.py Errors are Never Thrown

[Exper1mental]

It appears the errors listed in ``ErrorHandling.py` are never thrown for their respective issues. At least, I've not been able to invoke them when using roles that do not exist or stuff like that.

[TRJoseph]

Currently have implemented a fix for this. I decided to handle more of the common errors inside of the function call with a try: except: approach. I feel as if this will help to give the user more accurate feedback for their specific misstep when using the bot. I kept more broad errors inside of the error handling .py in case something else goes awry such as trying to call a command that does not exist. Let me know what you think about this approach and I will close the issue if this sounds good.

[Exper1mental]

Hmm... I'm inclined to say yes, but I'd need a better idea of what you're thinking of for this. They definitely should only include the specific line(s) relevant to the error though.