rename user page in tweets controller (best -> user_best, timeline -> user_timeline)
fix pagination: can't render page 2 or later in user_discoveries
Merge branch 'new_design'

Conflicts:
	app/views/tweets/user_favorites.html.haml
	app/views/tweets/user_retweets.html.haml
update README.md, add LICENSE.txt
fix tweets#user_discovered_by
fix text in about#index
fix Atom feed templates
hide loading animation by default
Merge branch 'new_design'
fix sidebar: threshold menu was hidden in user_timeline / user_discoveries / user_discovered_by