Default to both REPL and console printing

Weasel by default overwrites the *print-fn* global variable to redirect
all printing to the REPL after the REPL connection has been opened. In
practice this means that if you are using boot-cljs-repl and are also
printing to the console via `(enable-console-print)`, your console printing will
work for an abritrary period of time until it doesn't anymore.

This patch configures Weasel to set the *print-fn* to print to the REPL
and the console. IMO, this is the best default to ensure that users
aren't confused when half print statements stop working. It's not at all
obvious that what the cause is and the amount of people that will be run
into this problem is large.

I'm also open to exposing this as an option for the task, if you think
that's a good idea.

Addresses this issue: adzerk-oss#26

src/adzerk/boot_cljs_repl.clj

@@ -48,7 +48,7 @@
             (:require [weasel.repl :as repl]))
           (let [repl-conn ~conn]
             (when (and repl-conn (not (repl/alive?)))
-              (repl/connect ~conn)))))
+              (repl/connect ~conn :print #{:repl :console})))))
        (map pr-str) (interpose "\n") (apply str) (spit @out-file)))
 
 (defn- write-repl-connect-file