Add missing functions to dynet_viz
Add missing functions to dynet_viz


Former-commit-id: 17d09c9339ddbfc52055ffe96b76949be2608655
xunzhang/dynet,xunzhang/dynet,xunzhang/dynet,clab/cnn,clab/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,clab/cnn,clab/dynet,chunyang-wen/dynet,danielhers/dynet,clab/dynet,clab/dynet,clab/dynet,chunyang-wen/dynet,clab/dynet,danielhers/dynet,clab/dynet,shuheik/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,danielhers/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,xunzhang/dynet,chunyang-wen/dynet,chunyang-wen/dynet,clab/cnn,danielhers/dynet