Revert "Revert "Revert "add sharing on tumblr, weibo and renren"""

This reverts commit 0fb5e02404a9b5255432946df680ed5937760fe6.
Revert "Revert "add sharing on tumblr, weibo and renren""

This reverts commit ed35e8bb3277f845b6c6af9df55e3a0731b019ce.