improve vim javascript support
update handlebars vim plugin to the new unified mustache/handlebars one
change ~/.vimrc to more portable $MYVIMRC
emacs update

OS X's bundled emacs is old as dirt, and I need an updated version to
[play with
evil-mode](http://bling.github.io/blog/2013/10/16/emacs-as-my-leader-evil-mode/)
fix bootstrap script to work properly in zsh