Update README.md
Implementing: using icon instead of text for right-top buttons in RightComment, additional fold button for feed-item
Implemented additional fold button for feed-item
Implemented additional fold button for feed-item in Home page
Improved size of RightComment
Fixed refreshing RightComment when 匿名 toggled
Fixed processing collapsed answer of users own
Adjusted size calculating for RightComment
Updated tip for buttons
Built beta version 2.7.4.380
Improved size calculating and resizing for RightComment
Fixed resizing and relocating RightComment
Built 380 beta
Built 2.8.0.380