add some task
add some task

forging2012/HyperDown,jinjian1991/HyperDown,easychen/HyperDown,mithenji/HyperDown,assad2012/HyperDown,lishengzxc/HyperDown,initc/HyperDown,lcp0578/HyperDown,no2key/HyperDown,zhangran/HyperDown,jinjian1991/HyperDown,royalwang/HyperDown