Added cache_enabler_no_bypass_response filter

[janvitos]

With cache_enabler_no_bypass_response filter, we can choose NOT to bypass the cache for different response codes provided by the user in an array.

Example use of cache_enabler_no_bypass_response filter to bypass 404 pages:

add_filter( 'cache_enabler_no_bypass_response', 'ce_no_bypass_response' );
function ce_no_bypass_response( $response ) {
    $response = array(404);
    return $response;
}

This was created to address issue #213.