Logging cleanup.

Add log4j-jetty properties.
Removed log4j imports
Cleaned up some System.out/err.println calls
Moved a lot of statements to debug
Ready for modify py transform.
Refactored python transformations

Broke up the python transformations and preview

Added first draft of submit edit python transformation.  Not quite
ready yet.
Initial working state of edit py transform command

Need some debugging and vetting.
Fixed undo/redo of edit py transformation
Hide editPyTransform button when no transform to edit
Disable column name editing for edit pytransform dialog box
Merge branch 'development' into logging-cleanup-modify-py

Removed some unnecessary output
Fixed the limit check on preview
Fixed offline generation of rdf for chained transforms

WorksheetR2RMLJenaModelParser needed to be updated to use
WorksheetCommandHistoryReader.executeListOfCommands().  Otherwise, it
tried to verify every command had a valid hNode source before applying
any column transformations, which caused transforms that operated on
anything that wasn't in the original source to be thrown out.

Some more clean up of unused imports and some non-static accesses.
Merge pull request #34 from InformationIntegrationGroup/logging-cleanup-modify-py

Logging cleanup modify py
v180 edit python transform, logging cleanup
Merge branch 'development'