Ablation summary files now have an extra column that show the ablated
feature. In addition, the summary file fields that were objects such
as lists or dictionaries are now more readable instead of being
json-dumped strings.
Merge branch 'develop' of https://github.com/EducationalTestingService/skll into feature/show_ablated_feature
Made the list and dictionary types written to summary TSV files
more readable.
Add warning when cleaning up JSON objects fails.
Fixed the part in _write_summary_file that writes out more readable
version of the json-dumped strings such that it now works with both
python 2 and 3. Also used more explicit exception catching.
Merged
Removed all the unnecessary stuff about quotes and unicodes and only
retained the ablated_feature stuff.
Merge pull request #53 from EducationalTestingService/feature/show_ablated_feature

Show ablated feature in ablation summary files