Add warning for Repl usage
Add warning for Repl usage

* plugin/gorilla.vim (Repl.initialize): add warning at top of Repl buffer

* plugin/gorilla.vim (print_in_buffer): do not suppress trailing empty lines

* plugin/gorilla.vim: removed obsolete include of singleton

clones/vimclojure,clones/vimclojure,emezeske/vimclojure,sattvik/vimclojure-ae,guns/vimclojure,guns/vimclojure,sattvik/vimclojure-ae,jgrocho/vimclojure,kotarak/vimclojure,sattvik/vimclojure-ae,clones/vimclojure,emezeske/vimclojure,jgrocho/vimclojure,jondistad/vimclojure,kotarak/vimclojure,guns/vimclojure,emezeske/vimclojure,kotarak/vimclojure,jondistad/vimclojure,jgrocho/vimclojure