added share link to photo.html
changed config values

I should better move these config variables somewhere else.
added follow action from profile page

enabled follow, follow request and unfollow.
added opacity transitions to video indicators
remember the last page you were at
set default number of posts returned

each row shows three posts, so it looks better if each row shows three
posts. however, there are some inconsistencies with the number of
posts returned by the api, for example, the result of liked media is
one less than what is specified in count parameter
removed empty parentheses on user lists
load more for follow lists