Change RTD URLs back to original, since they finally fixed the issue our original project was having.
Add support for writing/reading ARFF and CSV files to data.py
Add support for reading/writing ARFF and CSV files to skll_convert.
Add tests for reading/writing ARFF and CSV files.
Numerous attempts at fixing label-less ARFF file handling
Update documentation and supporting scripts to handle ARFF and CSV files.
Removed unnecessary scripts.
Fix stupid Python 2.7 compatibility issue.
Fix yet another 2.7 CSV module incompatibility issue.
Fix yet another CSV 2.7 incompatibility issue, this time with StringIO needing to be BytesIO.
Merge branch 'release/0.18.1' into develop
Merge branch 'master' into develop
Merge branch 'develop' into feature/arff_and_csv_support

Conflicts:
	skll/data.py
Remove unnecessary import accidentally included when merging
Made split_with_quotes static
Initial attempt at adding all combinations mode to run_ablation.
Fix a couple typos in experiments.py
Update name of column in `summarize_results` to `ablated_features`
Fix potential issues with handling strings in ARFF files.
Fix stupid typo