.zprofile: fix the procedure to prevnet multiple dropbox instance
dired-conf.el: remove unused comment
misc-conf.el: remove wrong comment
install-keychain.sh: new
keychain: add keychain as submodule
create-symlinks.sh: new
c-style-conf.el: add some tweak
ruby-conf.el: move ruby-electric configration into ruby-electric-conf.el