beta-tester issues 1: minor

[bsureshkrishna]

1. In the sign-up page, the heading and the paragraph on the left side of the screen is written in color white, it is somehow difficult to read those words.                                       # Jacky, macbook, Google Chrome

2. In the login page, it says we can use both username and email to login, but it only accepts the email (the error message still shows “Enter a valid email or username”)            # Jacky, Google Chrome**