Keep more dynamic vars

[vemv]

This block:

eastwood/src/eastwood/analyze_ns.clj

Lines 335 to 337 in 29eb37a

	(binding [reader/*data-readers* *data-readers*
	*ns* *ns*
	*file* (str source-path)]

shoud be expanded with more clojure.core vars so that analysing namespaces becomes less side-effectful.