Adding authorization and deauthorization mechnanism
Displaying user's feed

properly display user’s feed
adding Instagram API wrapper class
adding query string getter class
Adding get user media method

adding get_user_media method and using it for the main page of the
plugin
Displaying tag media

Adding get_tag_media method
Adding get method which can be re-used for most query string getter
mechanism
Deleting max_id method

Deleting max_id method on WP_IG_QueryStrings since get() can do its job
easily