Add usage instructions and screenshots (#287)

readme.md

@@ -14,8 +14,26 @@ Enable Two-Factor Authentication using time-based one-time passwords (OTP, Googl
 
 ## Description ##
 
+Use the "Two-Factor Options" section under "Users" → "Your Profile" to enable and configure one or multiple two-factor authentication providers for your account:
+
+- Email codes
+- Time Based One-Time Passwords (TOTP)
+- FIDO Universal 2nd Factor (U2F)
+- Backup Codes
+- Dummy Method (only for testing purposes)
+
 For more history, see [this post](https://stephanis.info/2013/08/14/two-cents-on-two-factor/).
 
+## Screenshots ##
+
+### Two-factor options under User Profile.
+
+![Two-factor options under User Profile.](assets/screenshot-1.png)
+
+### U2F Security Keys section under User Profile.
+
+![U2F Security Keys section under User Profile.](assets/screenshot-2.png)
+
 ## Get Involved ##
 
 Development happens [on GitHub](https://github.com/georgestephanis/two-factor/). Join the `#core-passwords` channel [on WordPress Slack](http://wordpress.slack.com) ([sign up here](http://chat.wordpress.org)).

readme.txt

@@ -8,8 +8,23 @@ Stable tag: trunk
 Enable Two-Factor Authentication using time-based one-time passwords (OTP, Google Authenticator), Universal 2nd Factor (FIDO U2F, YubiKey), email and backup verification codes.
 
 == Description ==
+
+Use the "Two-Factor Options" section under "Users" → "Your Profile" to enable and configure one or multiple two-factor authentication providers for your account:
+
+- Email codes
+- Time Based One-Time Passwords (TOTP)
+- FIDO Universal 2nd Factor (U2F)
+- Backup Codes
+- Dummy Method (only for testing purposes)
 
 For more history, see [this post](https://stephanis.info/2013/08/14/two-cents-on-two-factor/).
+
+
+== Screenshots ==
+
+1. Two-factor options under User Profile.
+2. U2F Security Keys section under User Profile.
+
 
 == Get Involved ==