Moved Prediction from Env to Observation. You can now pass your own predictor to the tree observation builder. if no predictor is passed everything stays the same.

added get_many() method to observation builders, base class and derived. Also removed the render() methods in the env base class and railenv

fixed bug for treeobs in curved rails: now the tree branch will look as 'forward' even on a curve

See merge request !59

Fix43and60

Closes #60

See merge request !58

Cleanup flake8 once more

See merge request !56

code cleanup

See merge request !55

Changed behavior of environment to change action_dict of agents after their input. --> Giacomo please check that this is ok with your implementation

updated observation to cummulate the number of observed agents with same or other direction along each branch

Resolve "run examples in ci as integration tests, preferably with assertions"

Closes #51

See merge request !54

#56 bugfix dimensions in explore branch

Closes #56

See merge request !53

Update split_tree in observations.py to include the agent direction and normalize the state correctly

Merge branch 'master' of gitlab.aicrowd.com:flatland/flatland into 51-run-examples-in-ci-including-notebooks