Fix for font size setting on custom dropdown

The custom dropdown should be using the available variable $custom-dropdown-font-size.
Otherwise the size is fixed which causes problems in the grid if you change the fontsize of the standard inputs
Fix front-page typo

"site our app" => "site or app"

Probably a good idea to fix these little issues throughout.
add closing html tag to haml template
Fix "iterator.call is not a function" error when used with prototype js.

... or any library that extends native JavaScript arrays.

Switch for/in loop with a traditional for ;; loop to enumerate through an array. This will ignore prototype's enumerable method properties.
reordered topbar fixed code
fixed active link selector
Add scope back to clearing, fix dropdown toggle on click.
Merge branch 'master' of github.com:zurb/foundation
Fix typo in Definition Lists example.
Merge pull request #2120 from GeorgePhillips/#2022

reordered topbar fixed code
Merge pull request #2117 from jasonwoan/play-nice-with-prototype

Fix "iterator.call is not a function" error when used with prototype js.
Merge pull request #2130 from etienne/docs-fix-typo

Fix typo in Definition Lists example.
Fix topbar typo.
Bump topbar version.
Fix top bar code indentation.
Fix clearing regression from RTL release.
Add clearing holder to preserve inject point after assembly.
Add data-options support to clearing.
Port expose from standalone Joyride to Foundation.
Turn expose off by default.