updated pycnn_viz for recent additions to pycnn.pyx
updated pycnn_viz for recent additions to pycnn.pyx

Former-commit-id: 75b3110582e7f3436fbd7ffc410a269e10614667
danielhers/dynet,clab/dynet,clab/dynet,shuheik/dynet,chunyang-wen/dynet,xunzhang/dynet,shuheik/dynet,chunyang-wen/dynet,shuheik/dynet,clab/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,xunzhang/dynet,clab/dynet,clab/cnn,chunyang-wen/dynet,clab/dynet,shuheik/dynet,clab/cnn,danielhers/dynet,clab/cnn,shuheik/dynet,danielhers/dynet,danielhers/dynet,xunzhang/dynet,danielhers/dynet,xunzhang/dynet,clab/dynet,shuheik/dynet,danielhers/dynet,chunyang-wen/dynet