updating version tag for 2.0.2 release

updating version tags for Spark 2.0 preview release #3

merging latest changes from master

updating version in Mobius release package name

updating version for M3 release

setting version for preview release

updating version

verion update and minor changes

fix bug in copyjar that happens in tagged releases due to multiple fi…

…les that match pattern (#422)

Merge pull request #401 from Microsoft/master

merging latest changes from master to branch-1.6