some doc
some doc


Former-commit-id: 45166ba9884f28de7928f1fd36dadf9478acc403
chunyang-wen/dynet,danielhers/dynet,xunzhang/dynet,clab/dynet,danielhers/dynet,clab/dynet,shuheik/dynet,danielhers/dynet,clab/cnn,chunyang-wen/dynet,chunyang-wen/dynet,xunzhang/dynet,danielhers/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,shuheik/dynet,xunzhang/dynet,clab/dynet,clab/cnn,shuheik/dynet,clab/dynet,clab/dynet,shuheik/dynet,shuheik/dynet,chunyang-wen/dynet,clab/dynet,clab/cnn,danielhers/dynet,danielhers/dynet,xunzhang/dynet