remove links and point to release page instead.

Author: rabbah

README.md

@@ -1,17 +1,7 @@
 # OpenWhisk Shell
 
-Welcome to the OpenWhisk shell. To get started, download the [one of the binary releases](#images).
+Welcome to the OpenWhisk shell. To get started, download the [one of the binary releases](https://github.com/serverless-research/openwhisk-shell/releases).
 
 ## Exploring the Shell
 
 For a comparative study, of `wsk` versus this new cli-gui shell, check out these [demos]( https://openwhisk.ng.bluemix.net/api/v1/web/nickm_wskng_demos/public/index.html).
-
-## <a name="images">Installation using a pre-built binary
-
-  - macOS: [OpenWhisk.dmg](https://ibm.box.com/shared/static/men880t5v21usgfw3895u4gcdaiu6kmr.dmg)
-  - Windows [OpenWhisk-win32-x64.zip](https://ibm.box.com/shared/static/obyr7i38knwciwdc1vbj7811m6ulm25f.zip)
-  - Linux [OpenWhisk-linux-x64.zip](https://ibm.box.com/shared/static/pqg9f2c9mivpkobu3danzdy4crahpp1n.zip)
-
-Currently, these images are not signed, so you will get a security warning when launching the app. To allow access to the app on macOS, either command-click (right-click) and Open, or double-click the app, and then open the Security & Privacy preferences pane, and click "Open anyway".
-
-<img width="150" alt="Granting permission on macOS" src="https://user-images.githubusercontent.com/4741620/28502723-9b8c550e-6fc6-11e7-9ad1-212e7c75f98e.png">