updated FetchColumnCommand to use appropriate file paths and graphUri
cleaned code for Invoke ML service
updated SPARQL generator class to handle missing links
fixed null pointer issue while backtracking for parent node
fixed bug in header for csv
fixed file path issues in InvokeDataMiningServiceCommand
Merge pull request #85 from shrikanthn/shri-dm-service

CSV Export changes as per karma restructuring
Disabled writing worksheet history in offlinemode

WorksheetHistoryMetadata now enables a flag in CommandHistoryWriter
Cleaned up TestCSVFileRDFGenerator
Removed some unused imports.
separate group by
fixed issue with Excel import
Imlemented data mining result parsing
 - showing the json result for training phase in new worksheet
 - showing the json result for testing phase in new worksheet
 - loading the predicted column in a new work sheet along with the test data set
 - showing the confusion matrix in a new worksheet
cleaned js code
Added ability for users to provide pytransforms

To do so, add module to $USER_KARMA_HOME/python/karma/transformation
Update $USER_KARMA_HOME/python/karma/transformation/__init__.py to read
all = [ “userModule.py” ]
Merge pull request #86 from shrikanthn/shri-dm-service

Data mining result parsing implementation
add values modified
merged branch
add group by
preliminary unfold
Merge branch 'organize-columns-command' into development

Conflicts:
karma-web/src/main/webapp/js/tableOptions.js
karma-web/src/main/webapp/tableOptionsDialogs.jsp
Set Karma user directory to be {user.home}/karma instead of {user.home}/.karma