Add in an easy way to import and export bar configurations, similar to how WeakAuras or Platter does this.

May want to give different options, e.g. entire configuration, entire class, entire spec, bar text for all, bar text for class, bar text for spec.

Sort of related to #55

This may be a good library to handle setting conversion/export:
https://github.com/rxi/json.lua

Then take that output and Base64 it with this:
https://github.com/iskolbin/lbase64

Both of these libraries are working like a charm inside of WoW!