Cleaned up ReaderUserListActivity
No longer retrieving and then passing entire post object around to obtain liking info
Switch reader_activity_userlist.xml to a LinearLayout
ReaderUserListActivity now uses a fixed size
Entire liking user cell is now highlighted when tapped (previously only the url would highlight)
Simplified title to just "People who like this" and changed title style so it doesn't use hyperlink color (since it's not clickable)
Reverted to previous title, fixed size of user list activity is now larger in landscape
Merge branch 'issue/1410-delayed-liking-users' of https://github.com/wordpress-mobile/WordPress-Android into issue/1336-reader-sloppy-swiping
Resolved merge conflicts with PR #1411