Registers a compiler that is run before all other compilers.
The compiler function is called with each matching element as a
jQuery object.
If you're not using jQuery, use up.macro() instead, which calls
the macro function with a native element.
Example
up.$macro('[content-link]', function($link) {
$link.attr(
'up-target': '.content',
'up-transition': 'cross-fade',
'up-duration':'300'
)
})
