Updates and new functions in homebrew.js

- Added a new function `$.countify()`, which is basically a character
counter function.

- Added a new function `$.fn.queryString()`, which lets you get the
query string of the current URL.

- Moved `loadScript()` to be inside the jQuery namespace. Now, instead
of running `loadScript()`, you have to run `$.fn.loadScript()` instead.

- Updated some comments
Extended the `togglerify` function

It now has a number of parameters that let you adjust its behaviour when
needed. Also, lots of explanation for this function right in the JS
file.
Fixed trailing comma

The trailing comma causes errors in older IE browsers. Removed it, so no
more errors.
Cleaned up formatting
Updated Banners doc
Updating docs

Started documentation for queryString function
Merge remote-tracking branch 'origin/v1.5-feature' into v1.5