[DATALAD] exclude paths from annex'ing

.gitattributes

@@ -1,3 +1,10 @@
 
 * annex.backend=MD5E
-**/.git* annex.largefiles=nothing
+**/.git* annex.largefiles=nothing
+*.bval annex.largefiles=nothing
+*.bvec annex.largefiles=nothing
+*.json annex.largefiles=nothing
+*.tsv annex.largefiles=nothing
+.bidsignore annex.largefiles=nothing
+CHANGES annex.largefiles=nothing
+README annex.largefiles=nothing