Merge pull request #767 from effigies/test/regressors_tsv_gz

FIX/TEST: gunzip regressors.tsv.gz, allow timeseries.tsv as well

Author: effigies

bids/tests/data/synthetic/derivatives/fmriprep/sub-01/ses-01/func/sub-01_ses-01_task-nback_run-01_desc-confounds_regressors.tsv

@@ -303,8 +303,9 @@ def _load_time_variables(layout, dataset=None, columns=None, scan_length=None,
         if regressors:
             sub_ents = {k: v for k, v in entities.items()
                         if k in BASE_ENTITIES}
-            confound_files = layout.get(suffix='regressors', scope=scope,
-                                        extension='.tsv', **sub_ents)
+            confound_files = layout.get(suffix=['regressors', 'timeseries'],
+                                        scope=scope, extension='.tsv',
+                                        **sub_ents)
             for cf in confound_files:
                 _data = pd.read_csv(cf.path, sep='\t', na_values='n/a')
                 if columns is not None: