Added NSFW icon
Merge remote-tracking branch 'origin/master' into dev/mn/style_links

Conflicts:
	app/src/main/java/com/nguyenmp/reader/SubredditLinkListingFragment.java
	app/src/main/res/values/strings.xml
Somewhat of a cards UI going on right now
Fixed weird issue where background of list view wasn't the same as swipe view
Implemented infinite scrolling