Merge pull request #29 from jhartlaub/master-csd

SHARK-159: outer join on null key would output the same row value for al...
[maven-release-plugin] prepare release shark-0.8.0-candidate-csd-13
[maven-release-plugin] prepare for next development iteration
Remove extra 'shark' from version
Merge pull request #30 from markhamstra/versionFix

Remove extra 'shark' from version