Added the first and very raw version of PasscodeLocker - See#44.

If you want to test the Lock uncomment the line AppLockManager.getInstance().enableDefaultAppLockIfAvailable(this) in WordPress.java
Set the default timeout of the PassLock to 2 secs
Passlock: unregister the listener when the user removes the lock.
Update the comment details view when the moderation network call ends with OK.
Passlock: set the extended timeout period (60secs) when the user click on the URL in Comment Details, or when sharing a post. Otherwise the user needs to insert the passcode when returning to the app.