update of api docstrings across coach and tutorials [WIP] (#91)

* updating the documentation website
* adding the built docs
* update of api docstrings across coach and tutorials 0-2
* added some missing api documentation
* New Sphinx based documentation

docs/_sources/features/benchmarks.rst.txt

@@ -0,0 +1,22 @@
+Benchmarks
+==========
+
+Reinforcement learning is a developing field, and so far it has been particularly difficult to reproduce some of the
+results published in the original papers. Some reasons for this are:
+
+* Reinforcement learning algorithms are notoriously known as having an unstable learning process.
+  The data the neural networks trains on is dynamic, and depends on the random seed defined for the environment.
+
+* Reinforcement learning algorithms have many moving parts. For some environments and agents, there are many
+  "tricks" which are needed to get the exact behavior the paper authors had seen. Also, there are **a lot** of
+  hyper-parameters to set.
+
+In order for a reinforcement learning implementation to be useful for research or for data science, it must be
+shown that it achieves the expected behavior. For this reason, we collected a set of benchmark results from most
+of the algorithms implemented in Coach. The algorithms were tested on a subset of the same environments that were
+used in the original papers, and with multiple seed for each environment.
+Additionally, Coach uses some strict testing mechanisms to try and make sure the results we show for these
+benchmarks stay intact as Coach continues to develop.
+
+To see the benchmark results, please visit the
+`following GitHub page <https://github.com/NervanaSystems/coach/tree/master/benchmarks>`_.