I would like to be able to convert an elixir string(binary) to a base10 integer.

I have been able to do this with the following...

```
<<104, 101, 108, 108, 111>> # equal to string "hello"
|> Base.encode16()
|> Integer.parse(16)

{448378203247, ""}

```

The above does what I am after but, feels a little like a hack. I would like to...

* better understand what exactly is happening here
* know if/how I would be able to do this in one step