cdef -> cpdef
cdef -> cpdef


Former-commit-id: 2a72e62482687c1c925b935c0039546f8c14c7fc
clab/cnn,danielhers/dynet,chunyang-wen/dynet,shuheik/dynet,clab/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,danielhers/dynet,clab/dynet,danielhers/dynet,shuheik/dynet,danielhers/dynet,chunyang-wen/dynet,xunzhang/dynet,clab/dynet,shuheik/dynet,xunzhang/dynet,shuheik/dynet,clab/cnn,clab/cnn,clab/dynet,xunzhang/dynet,shuheik/dynet,clab/dynet,xunzhang/dynet,chunyang-wen/dynet,chunyang-wen/dynet,danielhers/dynet,danielhers/dynet,shuheik/dynet,clab/dynet