Indicators and 2ndF

A little update to the project:

1. I have implemented the 2ndF button changes. Don't get me wrong: The functionality is not there yet. You need working buttons first before you actually implement the functions. But you can see what is in store.
2. Same goes for [/font]Mode+ and Mode- which activate the most interesting new feature: The Base-N arithmetic.
3. The indicators now work as expected.
4. On Android I make better use of the Action Bar.

I hope you like the new feature.