Better variable output structure from the interactive connector's `store` command

[sonrad10]

Currently, when running interactiveConnector.store() variables are returned in the format Map<string,Map<string,BinaryTree>> (where the outer map represents the program, and the inner maps represent the individual variables).

I propose changing this instead to the following format:

{
    name: string,  //The name of the variable
    program: string,  //The program where the variable was declared
    value: BinaryTree,  //The value of the variable (as before)
}[]

This would be simpler to use than iterating over nested maps.