Merge pull request #23 from magomimmo/closure

start adding closures
explain loop/recur
Merge branch 'master' of github.com:swannodette/lt-cljs-tutorial
More defmulti exposition
Clarify this in protocols
Explain extend-protocol a bit more
Small typo.
defn functions inside let bindings are still available outside
Merge pull request #26 from DjebbZ/closures

defn functions inside let bindings are still available outside
Merge pull request #24 from DjebbZ/patch-1

Small typo.
Explain top level issues