Make output plot: Blocks, Assigned blocks per Vehicle

[j-brendel]

I would like to have 2 more output plots:

1. Blocks
   This plot schould look like this
   
   or this
   
   ans should show the distribution of blocks for the analyzed schedule.
   A sensible sorting would be good (e.g. by starting time and vehicle type).

2. Assigned blocks per Vehicle
   In a second, similar plot, it would be nice to have one vehilce per line and then the assigned blocks of that verhicle depicted in the same was as above.
   A sensible sorting would be good (e.g. by starting time and vehicle type).

All of the above plots should be created per depot.

[j-brendel]

solved in #212