Merge pull request #832 from igniterealtime/3.0.2

Denote Spark 3.0.2 release

Merge pull request #766 from igniterealtime/spark301

Denote Spark 3.0.1 Release

Merge pull request #753 from akrherz/300

Denote Spark 3.0.0 Release

Merge pull request #620 from akrherz/3beta

Denote release 3.0.0-beta

Merge pull request #564 from akrherz/294

Denote release 2.9.4

Merge pull request #545 from akrherz/293

Denote Spark 2.9.3 Release

Denote Spark 2.9.2 Release

Merge pull request #514 from akrherz/291

Denote Spark 2.9.1 Release

Merge pull request #509 from akrherz/290

Denote Spark 2.9.0 Release

Merge pull request #296 from wrooot/master

Denote Spark 2.8.3 Release