Strings are not supported

[glomdom]

Figure out a way to support string.

I've thought up of 2 ways to go about this:

1. Start working on the attribute that can take in a function to use to parse the field.
2. Or, default to parsing strings as being null-terminated first, and allow people to specify how to parse their strings.

Overall, I think the 1st way would be more intuitive, as it will allow for even ints or other types to be parsed other ways than the default.