Merge pull request #3 from apache/tisonkun-patch-1

Create .asf.yaml with project settings

Merge pull request #2 from tisonkun/patch-1

Remove unused files

Revise README with updated project details

Merge pull request #1 from apache/remove_travis

Delete .travis.yml

Adding tools directory

Update datasketches (parent)

Cleanout in preparation for a parent POM

Update README.md

Update index.md

Update README.md

Update HLL.md

Update README.md