Partial fix for wp default redirect upon failed login.
Style default WP login/register/lostpass pages. Ready to switch.
Decided to scrap the custom login page for bbPress. There are already
functions in WP to handle the whole login process, and it would be adding
complexity to remake all that. Instead, the default login page for WP now
uses the theme's style.
Set login link to WP default login page. Add redirects for login/logout.