Fix function/alias naming clash between bower and bundle plugin
Fix function/alias naming clash between bower and bundle plugin

Since the `bower` plugin specifies a `bi` alias and `bundle` plugin
specifies a `bi` function, there is a name clash when using both
plugins, which results in the message "Can't 'bundle install' outside a
bundled project" when trying to execute `bower`.

This adresses #2486

erwinvaneijk/oh-my-zsh,erwinvaneijk/oh-my-zsh