bumping version to 0.2.2
use specific sbt version
adding autoSort and allowDuplicateXValues to XYSeries
use standard directories (sources inside their respective packages)
remove useless point (syntax)
fix documentation bug
adds documentation use cases to dataset conversion methods
use new, more concise entity link syntax in documentation
adds 0.2.2 release notes
Merge branch 'hotfix-0.2.2'