segrnn update
segrnn update


Former-commit-id: c20608ad21013d8fd16d717fd48b34d051164ef8
shuheik/dynet,chunyang-wen/dynet,clab/dynet,danielhers/dynet,shuheik/dynet,chunyang-wen/dynet,shuheik/dynet,danielhers/dynet,shuheik/dynet,clab/cnn,danielhers/dynet,clab/dynet,xunzhang/dynet,clab/dynet,shuheik/dynet,shuheik/dynet,chunyang-wen/dynet,chunyang-wen/dynet,clab/cnn,clab/dynet,clab/dynet,clab/dynet,danielhers/dynet,danielhers/dynet,clab/cnn,xunzhang/dynet,danielhers/dynet,xunzhang/dynet,shuheik/dynet,xunzhang/dynet,danielhers/dynet,clab/dynet