Add rake tasks to update retweet/favorite count and tweeter's profile image

[O-I]

It would be nice — but not necessary — to see current retweet and favorite counts for tweets I've favorited. In some cases, I'm one of the first people to favorite a tweet. I'd like to know if some of those tweets end up getting more favorites over the course of time.

Also, occasionally, people change their profile pics and that invalidates the tweeter_profile_image_url I use to render them. It would be nice to update this periodically to prevent missing assets. Additionally, I could add a default photo for when missing assets are unavailable.

[O-I]

Rake task for updating profile pics completed.

[O-I]

Adding a default photo for when image assets are missing seems to be impractical. Specifically, verifying response codes on each image like so if just too slow:

def profile_pic(favorite)
    url = favorite.tweeter_profile_image_url
    response_code = Net::HTTP.get_response(url).code
    profile_pic_url = response_code == '200' ? url.to_s : 'egg.png'
    image_tag profile_pic_url, class: 'fave-profile-pic'
  end

It's probably better just to have Heroku scheduler run rake pluck:update_pics daily. I might try using jQuery to replace broken images, though. (Also not worth it.)