config module added. Incorporates localvars, enginevars, enginePrivateVars. Remove localvars module
converted EngineAPI class to use new config module instead of internal engineVars and enginePrivateVars
remove private var ACLs, added TODOs
added "isset" method
switched to using a constant to hold the type name
renamed isset() methods to is_set() ... apparently isset is a reserved word that can't be overloaded on a class ...
converted to use new config/enginevars classes