Put the prediction module inside decoder.
Put the prediction module inside decoder.


Former-commit-id: 69b4f1237820eb50339ccd6d50ec17ae3e38af74
shuheik/dynet,danielhers/dynet,shuheik/dynet,shuheik/dynet,xunzhang/dynet,danielhers/dynet,clab/cnn,clab/dynet,danielhers/dynet,danielhers/dynet,clab/dynet,chunyang-wen/dynet,xunzhang/dynet,clab/dynet,chunyang-wen/dynet,chunyang-wen/dynet,clab/cnn,xunzhang/dynet,danielhers/dynet,clab/cnn,clab/dynet,danielhers/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,shuheik/dynet,shuheik/dynet,clab/dynet,shuheik/dynet,chunyang-wen/dynet,clab/dynet,xunzhang/dynet