Bug Fixes

• fix article page can't be center (232648b)
• fix cover can't normally display when use local img beta.1 (b0917b7)
• fix directory was not expanded when clicking the first level navigation on the mobile phone (b716463)
• fix recommend component margin value (aaf91b7)
• fix the misplacement of poster avatar (e2628c3)
• update default version info (8a3210c)