Mad coll

Work done to implement "UW Universal Workflow" functionality.
Both of these would look up the argument that the user gives in the mapping you have already created. The `fluka_to_id()` function could be something like:

```C++
int fluka_to_id(std::string x) {
  if (fluka_zz.count(x) == 0) {
    throw NotANuclide("fluka name could not be found");
  }
  return fluka_zz[x];
}
```

The `fluka()` function - which serves the role of the `id_to_fluka()` that you mention but we leave the `id_to_` prefix off by pyne convention, would be similar to the following:

```C++
std::string fluka(int nuc) {
  int x = id(nuc);
  if (zz_fluka.count(x) == 0) {
    throw NotANuclide("fluka id could not be found");
  }
  return zz_fluka[x];
}
```

There are many examples of these kinds of functions in nucname already.