Unescape regerxp source before printing it.
Merge pull request #5 from Gozala/selfhosted/print-regexp

Fix: regexes with forward slashes are printed with extra escaping
Merge remote branch 'kanaka/cljs_in_cljs' into cljs_in_cljs
Merge branch 'cljs_in_cljs' into gh-pages
Rebuild web REPL.