Rather than having a partial reset with individual elements having
their styles built back up, only elements without replacement
styles have specific properties 'reset'.
This commit also includes: a correction to the font mixin arguments
used on forms (the output is now valid CSS); the removal of
`overflow-y:scroll` from the `html` element which is now known to
cause some problems for jQuery modal plugins in Firefox.
On input elements with a `type` of `search`, WebKit on OS X will
display a cancel button after text has been entered. This can
look ugly or be poorly position when you've added other styles to
the input (especially additional padding).
