Merge pull request #599 from sappelhoff/add_noncustom_cols

[MRG] add non-custom events columns

Author: chrisgorgo

bids-validator/bids_validator/tsv/non_custom_columns.json

@@ -34,7 +34,9 @@
     "onset",
     "trial_type",
     "response_time",
-    "stim_file"
+    "stim_file",
+    "sample",
+    "value"
   ],
   "misc": [],
   "participants": ["participant_id"],