Merge remote-tracking branch 'origin/dev' into alon-docs-dev

docs/.gitignore

@@ -0,0 +1 @@
+_build

docs/Quick-Start.rst

@@ -28,6 +28,11 @@ To build the toolchains, you should run:
 .. Note:: If you are planning to use the Hwacha vector unit, or other RoCC-based accelerators, you should build the esp-tools toolchains by adding the ``esp-tools`` argument to the script above.
   If you are running on an Amazon Web Services EC2 instance, intending to use FireSim, you can also use the ``--ec2fast`` flag for an expedited installation of a pre-compiled toolchain.
 
+Finally, set up Chipyard's environment variables and put the newly built toolchain on your path:
+
+.. code-block:: shell
+
+    source ./env.sh
 
 What's Next?
 -------------------------------------------

docs/Tools/Treadle.rst

@@ -1,5 +1,9 @@
-Treadle
+Treadle and FIRRTL Interpreter
 ==============================
 
-`Treadle <https://github.com/freechipsproject/treadle>`__ is a circuit simulator that directly executes FIRRTL.
-It is especially useful for interactive debugging and small unit tests that benefit from a low-overhead simulator.
+`Treadle <https://github.com/freechipsproject/treadle>`__ and
+`FIRRTL Interpreter <https://github.com/freechipsproject/firrtl-interpreter>`__
+are circuit simulators that directly execute FIRRTL (specifically low-firrtl IR).
+Treadle is the replacement for FIRRTL Interpreter but FIRRTL Interpreter is still used within some
+projects. Treadle is useful for simulating modules in a larger SoC design. Many projects
+use Treadle for interactive debugging and a low-overhead simulator.