Add argparser feature

[tjcim]

Add the ability to call the script without requiring additional input from the user.

[2hands10fingers]

@tjcim

Arguments for parsing ideas
Date selection
ex: _python3 RedditImageScraper.py -sDate "10282017 -eDate "10292017" _

Subreddit selection
ex: python3 RedditImageScraper.py --sDate "10282017 --eDate "10292017" --sub "wallpapers"

Selection of download path
ex: python3 RedditImageScraper.py --path "destination/to/path"

Download just today's images
python3 RedditImageScraper.py --today --sub "wallpapers"

Extra
Download image name, link, and how many upvotes and downvotes the image got to a csv

ex: python3 RedditImageScraper --csv

Ability to filter NSFW images
ex: python3 RedditImageScraper --nsfwFilter

[tjcim]

I like all of those, except for the camel-cases, not very pythonic! :)

[2hands10fingers]

@tjcim Someone suggested making it --from and --to, so that's totally doable.