[Pylot] Gather a data set of camera images, bounding boxes, and segmented images

[ICGog]

In order to train models on Carla, we need to collect a large data set of camera images, bounding boxes (for vehicles, pedestrians, traffic signs and traffic lights), and segmented images.

We can collect data by running python data_gatherer.py --flagfile=configs/data_gatherer.conf. However, the car might sometimes get stuck after another car that is not moving, or it may reach its goal. We need either to check from time to time what the data gatherer is doing, or to extend the script to incorporate vehicle speed (e.g., the car is stuck if it hasn't moved for 30 seconds) or some other solution in order to automate data gathering.

[ICGog]

Closing because we've collected data.