* Support `yield` and `return` statements in Tune trainable functions
* Support anonymous metric with ``tune.report(value)``
* Raise on invalid return/yield value
* Fix end to end reporter test
* Lazily fill trial queue
* Update interface
* Update end to end reporter test
* Removed `next_trials()` method
* Lint
* Print total number of samples to be generated in progress reporter. Allow infinite samples.
* Nit check
* Remove all __future__ imports from RLlib.
* Remove (object) again from tf_run_builder.py::TFRunBuilder.
* Fix 2xLINT warnings.
* Fix broken appo_policy import (must be appo_tf_policy)
* Remove future imports from all other ray files (not just RLlib).
* Remove future imports from all other ray files (not just RLlib).
* Remove future import blocks that contain `unicode_literals` as well.
Revert appo_tf_policy.py to appo_policy.py (belongs to another PR).
* Add two empty lines before Schedule class.
* Put back __future__ imports into determine_tests_to_run.py. Fails otherwise on a py2/print related error.
* Fairly represented trial states.
* filter test
* Indent
* Add test to BUILD
* Address Eric's comments (show truncation by state).
* Sort trials, only show 20.
* Fix lint