Add discussion of LIBS_FROM_GIT

Add a pointer to installing clients via LIBS_FROM_GIT to local.conf
sample.  Mention in the git tree setup that the projects within are
usually installed via released pip versions.

Change-Id: I245094e51ea4a8ce983f6a1e48b6ab7ca5d309d0
diff --git a/samples/local.conf b/samples/local.conf
index b92097d..34c9e8b 100644
--- a/samples/local.conf
+++ b/samples/local.conf
@@ -63,7 +63,8 @@
 # Using milestone-proposed branches
 # ---------------------------------
 
-# Uncomment these to grab the milestone-proposed branches from the repos:
+# Uncomment these to grab the milestone-proposed branches from the
+# repos:
 #CINDER_BRANCH=milestone-proposed
 #GLANCE_BRANCH=milestone-proposed
 #HORIZON_BRANCH=milestone-proposed
@@ -74,6 +75,13 @@
 #NEUTRON_BRANCH=milestone-proposed
 #SWIFT_BRANCH=milestone-proposed
 
+# Using git versions of clients
+# -----------------------------
+# By default clients are installed from pip.  See LIBS_FROM_GIT in
+# stackrc for details on getting clients from specific branches or
+# revisions.  e.g.
+# LIBS_FROM_GIT="python-ironicclient"
+# IRONICCLIENT_BRANCH=refs/changes/44/2.../1
 
 # Swift
 # -----
diff --git a/stackrc b/stackrc
index 23a4a7c..cfdcd4d 100644
--- a/stackrc
+++ b/stackrc
@@ -268,6 +268,7 @@
 ##############
 #
 #  OpenStack Client Library Components
+#   Note default install is from pip, see LIBS_FROM_GIT
 #
 ##############
 
@@ -317,6 +318,7 @@
 ###################
 #
 #  Oslo Libraries
+#   Note default install is from pip, see LIBS_FROM_GIT
 #
 ###################