typo changes from Derrick Karpo
Fixed npe while getting data source name for local files.
Performance improvement for artifact sorting.
Merge pull request #380 from jawallace/data_source_name

Fixed npe while getting data source name for local files.
Moved methods only used by ArtifactData into the ArtifactData class. Cache rowData for each ArtifactData.
Removed stopwatch and debug printlns.
Removed another println
minor cleanup
Merge remote-tracking branch 'upstream/master'
Merge pull request #383 from jawallace/report_hang

Fixed report hang
Merge remote-tracking branch 'upstream/master'