Implement import conventions - #1098

Maybe add a test that overrides a default conventional alias (e.g. "numpy" = "nmp" instead of np) and an other ones that remove a default conventional alias (e.g. "seaborn": "" would remove from the map "seaborn": "sns").

Maybe add a test that overrides a default conventional alias (e.g. "numpy" = "nmp" instead of np) and an other ones that remove a default conventional alias (e.g. "seaborn": "" would remove from the map "seaborn": "sns").

@JonathanPlasse Ah, so you're thinking the configured aliases would extend the default ones instead of completely overriding them. That makes sense, so users wouldn't have to re-declare "pandas" = "pd" if they just want to add a new alias. I'll work on that approach.

Rock, thank you @edgarrmondragon! Made a couple changes at the end but LMK if you disagree w/ any of them!