Direct messaging
Sending:
* Message
* Media
* Hashtag
* Profile
* Like
Works for sending to one user or for list of users.
Media
* Added methods for deleting one media and list of medias.
* Method for getting media_id from link on media.
* Added method get_total_hashtag_medias().
Other
* Informative Instagram error message.
* Added method delete_comment().
* Updated user-agent and API version in config.
* Checking aspect ratio before uploading photo.
* Many small bugs has been fixed.