Add a view to show the current likelihoods

[ramack]

For all activities show:

• the current absolute (summed up) likelihood
• the contributions from each conditions
• in a view which allows global sorting? or better in the Main View additional to the Name? Do we need this on a conditions base also?
  an interesting alternative might be to show it in the view of the activitiy, as a graph over time using http://www.android-graphview.org/ maybe the last 24 hour are interesting?

[ramack]

shifted to 1.4.0 as with #182 this probably gets useless -> to be decided together.