Rewrite tests

The tests were referencing tools.analyzer and would fail when running
under mranderson as that library couldn't be found on the classpath.
I've rewritten the tests to rely on standard clojure namespaces instead.
Merge pull request #11 from clojure-emacs/rewrite-tests

Rewrite tests
Add resolve-missing

Resolve-missing is the op underlying cljr-add-missing-libspec.  It uses
slamhound to scan the classpath for any vars matching some name.