Expression output now needs to be an Option[Any]. Took out some needless constructor parameters. Added some documentation. Took out needless EvalCode functions that aren't going to be used.
Pass in list of imports. Whitelist a lot more packages. Simplify EvalCode. Up version number.
Specify a result key instead of an output map.
Allow security configuration to be passed in. Computations are now a function of Map[Symbol,Any] to Map[Symbol,Any].