Run II - correct pull request

Hi,

I added the taus to the example code. I ran on some available samples and I found no issues with accessing taus.

Right now the runExample features two simple plots (leadtaupt and ntaus), with a quite basic tau object selection featuring the discriminators from the POG.

Here you can find a couple plots produced with a basic selection through that code: http://vischia.web.cern.ch/vischia/13TeV_top/

I plan to use this vischia:runII as my main branch for runII stable code.

Cheers,
Pietro