Review follow up:

- Change doc comments on constants to regular comments
- Remove error detection/handling
- Don't line break long comments
- Move jQuery selectors and data attr accesses inline in expressions
  which use them instead of naming them with variables up front.
- Quote Object literal keys
Add bootstrap.showhide plugin

It fixes jQuery's show() and hide() functions when using Bootstrap's hide/hidden/show classes, which have started to use !important...