update readme

Author: lpabon

README.md

@@ -4,20 +4,34 @@
 `pxc` is a client side application which communicates with Portworx, Kubernetes,
 and other services to provide users with an integrated tool.
 
-# Status: Pre-alpha
-This tool is under heavy development.
-
 # Downloads
 Please refer to the [Releases](https://github.com/portworx/pxc/releases) page to
 download the latest build.
 
 # Usage
 `pxc` is a tool that communicates with Portworx as well as Container
-Orchestration systems like Kubernetes. To use this tool you must first create a
-context with the appropriate information. `pxc` uses the context to connect to
+Orchestration systems like Kubernetes. It can be run standalone or as a plugin
+to kubectl.
+
+## Kubectl Plugin
+Install `pxc` binary anywhere in your PATH and name it `kubectl-pxc`. You will
+then be able to run it like this:
+
+```
+$ kubectl pxc get nodes
+$ kubectl pxc get pvc
+$ kubectl pxc get pvc --kubeconfig=/path/to/kubeconfig.conf
+```
+
+`pxc` will automatically discover how to communicate with Portworx. No need for
+any prior setup.
+
+## Standalone 
+
+You must first create a context with the appropriate information. `pxc` uses the context to connect to
 the appropriate Portworx cluster to execute the requested command.
 
-## Creating a context
+### Creating a context
 You can create a context using the following command:
 
 ```
@@ -26,13 +40,13 @@ $ pxc context create mycluster --endpoint=<ip of cluster>:9020 --kubeconfig=/pat
 
 > NOTE: The default gRPC SDK port for Portworx is 9020
 
-### Connecting to Portworx running on a Kuberentes Cloud
+#### Connecting to Portworx running on a Kuberentes Cloud
 If you are running Portworx installed on a Kubernetes Cloud like GKE, EKS, etc,
 you may need to use the workaround in issue
 [#40](https://github.com/portworx/pxc/issues/40) to access the Portworx gRPC
 endpoint through the Kubernetes API.
 
-### What if you don't have a Portworx cluster?
+#### What if you don't have a Portworx cluster?
 `pxc` uses the [OpenStorage SDK](https://libopenstorage.github.io) to communicate
 with Portworx, therefore it is fully compatible with OpenStorage's
 `mock-sdk-server`. If you do not have a Portworx cluster, you can run the
@@ -43,16 +57,7 @@ $ docker run --rm --name sdk -d -p 9100:9100 -p 9110:9110 openstorage/mock-sdk-s
 $ pxc context create --name=mycluster --endpoint=localhost:9100
 ```
 
-## Installing as a kubectl plugin
-Install `pxc` binary anywhere in your PATH and name it `kubectl-pxc`. You will
-then be able to run it like this:
-
-```
-$ kubectl pxc get nodes
-$ kubectl pxc get pvc
-```
-
-## pxc sample commands
+### pxc sample commands
 Now that `pxc` has been setup with a context, you can do the following commands:
 
 ```