Replace AIC with lambda expression in code example

[elvisangelaccio]

The code example in the index page can be simplified by replacing the AIC-handler with an equivalent but less verbose Java 8 lambda expression.

[reckart]

Looks nice. Does it actually work like this out of the box or did you have to make any modifications to the TokenHandler interface or any other part of the code? I'm not very familiar with the Java 8 additions yet, but very curious.

[elvisangelaccio]

Yes, it works out of the box.