docs(@ciscospark/common): create standard readme
docs(@ciscospark/common): create standard readme

ciscospark/spark-js-sdk,mwegman/spark-js-sdk,bbender/spark-js-sdk,bbender/spark-js-sdk,adamweeks/spark-js-sdk,ciscospark/spark-js-sdk,bbender/spark-js-sdk,mwegman/spark-js-sdk,aimeex3/spark-js-sdk,aimeex3/spark-js-sdk,adamweeks/spark-js-sdk,adamweeks/spark-js-sdk,aimeex3/spark-js-sdk,mwegman/spark-js-sdk