updated Readme in preparation for a release
updated Readme in preparation for a release

stormpath/stormpath-sdk-node,wakashige/stormpath-sdk-node,stormpath/stormpath-sdk-node,robertjd/stormpath-sdk-node,peebles/stormpath-sdk-node,ck-lee/stormpath-sdk-node,peebles/stormpath-sdk-node