Login button isn't disabled until the user confirms that they're not a bot

[whitecoop]

I've been using your plugin (thanks, by the way) since it allows me to put recaptcha on the register page (as opposed to just the login page), but, just as in this feature request on a similar plugin, it'd be nice to have the login button disabled until the user confirms they're not a bot.

I tracked down the addition of that feature to the plugin mentioned above to this diff.

It looks like adding the lines from the code above to your code's main class line here would do the trick.

Is that possible? Thanks in advance