Add obstacles

[Nathans-mind]

Add obstacles the user must overcome before disabling Blocking.

[Nathans-mind]

Some Obstacle ideas:

• Typing test
• Maze
• Button with a timer after it
• Read Fake Terms and Conditions
• Doom
• Captcha (for the people who want to feel extra pain for giving in to distractions)

[benjamman]

Future problem related to this issue:

The only way to change the override password is in the settings for the Redirect Page. If someone wanted to change the override password for the popup and they're using a custom redirect or different obstacle it would end up very confusing.