Update README.md

add openshift setup instruct.
Merge pull request #26 from xiaods/master

fix #25 , upgrade actionhook utils
Use correct OpenShift port for websockets
Add infinite scroll to the "My Cards" page
Merge pull request #23 from smilledge/feature/my-cards-infinite-scroll

Feature/my cards infinite scroll
Merge pull request #29 from smilledge/feature/openshift-websockets

Use correct OpenShift port for websockets
REV: let openshift use minified js by grunt

export NODE_ENV=production
REV: remove useless information