Update following_html path & gitignore files

[rinaldipratama]

Because I have followed hashtags on Instagram, the python script checks the following hashtags instead of following people.

I changed the code:

• Check if 'following_hashtags.html' exist in following_path[0], so the instagram_file read the following_path in index 1. Because we choose the following.html file, not following_hashtags.html.
• Else we just set the following_path to index 0.

Also, I added the git ignore files. They should not be included in git, I think.

[aviolaris]

Thank you for your valuable contribution. I have made a minor refactoring to achieve a more concise implementation while retaining the same functionality.