update readme with links to binaries in bintray
## What is ocdev?
OpenShift Command line for Developers
+## Installation
+You can [download](https://dl.bintray.com/ocdev/ocdev/latest/) latest binaries (build automatically from current master branch).
+
### How to use ocdev as an oc plugin?
- make sure that ocdev binary exists in your $PATH
- copy the [plugin.yaml](./plugin.yaml) file to ~/.kube/plugins/ocdev/
