add train/test set sizes to results file
Intercept values printing for subclasses of BaseLibLinear.
Remove SKLL_MAX_CONCURRENT_PROCESSES tests from .travis.yml
Should satisfy #155.
Added end_timestamp and total_time to the learner_result_dict_base in experiments.py; these values now appear in the .results and .results.json file in addition to start_timestamp
updated test to account for two additional lines in results dict
Merge branch 'develop' of https://github.com/EducationalTestingService/skll into feature/print_model_weights_script_should_print_out_intercept
Changed number of rows to be checked for in learner results dictionary from 19 to 21 in tests/test_skll.py (due to the addition of end_timestamp and total_time).
Merge branch 'develop' into feature/dataset-sizes
Merge branch 'feature/dataset-sizes' into develop
Modified docstring on model_params to reflect my changes.
Merge branch 'develop' into feature/run-time
Changed number of rows to be checked for in learner results dictionary from 21 to 23 in tests/test_skll.py to accommodate two new fields added by Aoife.
Merge pull request #163 from EducationalTestingService/feature/print_model_weights_script_should_print_out_intercept

Feature/print model weights script should print out intercept
Merge pull request #167 from EducationalTestingService/feature/run-time

Feature/run time
Starting work on #153.
Merge branch 'develop' of https://github.com/EducationalTestingService/skll into develop
merged changes from develop