Timeout handling does not support the W3C protocol

[stof]

Setting timeouts is one of the few places where the protocol is abstracted:

php-webdriver/lib/WebDriver/Session.php

Lines 333 to 339 in 161f35e

	if (func_num_args() === 2) {
	$arg = array(
	'type' => func_get_arg(0), // 'script' or 'implicit'
	'ms' => func_get_arg(1), // timeout in milliseconds
	);
	$this->curl('POST', '/timeouts', $arg);

But the W3C protocol is different there.

Refs #84