Changed `seq(Object)` return values

Should work as explained in #6 now; that is, it's inline with
Clojure:

```clojure
(seq {:name "King Hank" :job "Ranger's goalie"})
; ([:name "King Hank"] [:job "Ranger's goalie"])
```
Remove `get` import
Merge pull request #9 from mstade/change-object-seq

Merging; resolved #6.