Differentiate ZeroMQ from RAET installations.

Refs saltstack#13687

HACKING.rst

@@ -162,12 +162,19 @@ Activate the virtualenv::
 
     source /path/to/your/virtualenv/bin/activate
 
-Install Salt (and dependencies) into the virtualenv::
+Install Salt (and dependencies) into the virtualenv.
 
-    pip install -r requirements.txt
+ZeroMQ Transport:
+
+.. code-block:: bash
+
+    pip install -r zeromq-requirements.txt
     pip install psutil
     pip install -e .
 
+
+.. note:: Installing M2Crypto
+
 .. note:: Installing M2Crypto
 
     You may need ``swig`` and ``libssl-dev`` to build M2Crypto. If you
@@ -177,6 +184,15 @@ Install Salt (and dependencies) into the virtualenv::
         env SWIG_FEATURES="-cpperraswarn -includeall -D__`uname -m`__ -I/usr/include/openssl" pip install M2Crypto
 
 
+RAET Transport:
+
+.. code-block:: bash
+
+    pip install -r raet-requirements.txt
+    pip install psutil
+    pip install -e .
+
+
 Running a self-contained development version
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~