Simplify `README.md` by adding Wiki URL (#66)
Simplify `README.md` by adding Wiki URL (#66)

## What changes were proposed in this pull request?

This PR simplify `README.md` by adding Wiki URL.

## How was this patch tested?

This closes #65
hortonworks-spark/spark-llap,hortonworks-spark/spark-llap,hortonworks-spark/spark-llap