Change vim-top-cluster to a function
Fix typo in docstring
Restore `syntax keyword` output in generate/vim-keywords
Update for Clojure 1.6.0-RC3

New keywords:
- some?
- if-some
- when-some
- hash-ordered-coll
- hash-unordered-coll
- mix-collection-hash
- record?
- unsigned-bit-shift-right

New lispwords:
- if-some
- when-some