import of dictionaries needs refactor of the runtime

[nmorse]

Runtime will need to handle either a wordStack (current) with a object wrapper around word dictionaries --OR-- change to a dictionary of dictionaries format (e.g. {nameSpace:{word1:{}}}).

runtime.js needs to support an IDE that is debugging a running program and wants to know the current imported dictionaries (currently loaded) (i.e. runtime needs to expose wordStack or wordNameSpaces and the findWord function)

[nmorse]

requirements:

• import should not duplicate dictionary/namespace (subsequent requests to import the same module is ignored)
• some consideration for speed (can it be optimized in the future?)
• local words need local scope, so the [namespace module dictionary] structs must support a stack or tree to support scoping.