doc changes to devstack overview.rst

changed to comply with doc conventions
When referring to services, use "Compute," "Image service"
and "Identity" instead of "nova," "glance," and "keystone."
Use the project names like "nova" and "keystone"
glance is officially Image service not storage
removed extra .

Change-Id: I39457c20dc2ede775fe3f3c63077133fbb6c917b

doc/source/overview.rst

@@ -7,7 +7,7 @@ and alternative platforms and support services. That evolution has grown
 well beyond what was originally intended and the majority of
 configuration combinations are rarely, if ever, tested. DevStack is not
 a general OpenStack installer and was never meant to be everything to
-everyone..
+everyone.
 
 Below is a list of what is specifically is supported (read that as
 "tested") going forward.
@@ -58,7 +58,7 @@ Web Server
 OpenStack Network
 -----------------
 
-*Default to Nova Network, optionally use Neutron*
+*Defaults to nova network, optionally use neutron*
 
 -  Nova Network: FlatDHCP
 -  Neutron: A basic configuration approximating the original FlatDHCP
@@ -67,10 +67,10 @@ OpenStack Network
 Services
 --------
 
-The default services configured by DevStack are Identity (Keystone),
-Object Storage (Swift), Image Storage (Glance), Block Storage (Cinder),
-Compute (Nova), Network (Nova), Dashboard (Horizon), Orchestration
-(Heat)
+The default services configured by DevStack are Identity (keystone),
+Object Storage (swift), Image Service (glance), Block Storage (cinder),
+Compute (nova), Networking (nova), Dashboard (horizon), Orchestration
+(heat)
 
 Additional services not included directly in DevStack can be tied in to
 ``stack.sh`` using the :doc:`plugin mechanism <plugins>` to call