Added install instructions from release
Added install instructions from release

As described by @madflow on [issue #67](https://github.com/madflow/flow-netbeans-markdown/issues/67).
stengerh/flow-netbeans-markdown,stengerh/flow-netbeans-markdown,madflow/flow-netbeans-markdown,dublebuble/flow-netbeans-markdown,dublebuble/flow-netbeans-markdown,madflow/flow-netbeans-markdown