annex the right things

.gitattributes

@@ -1,4 +1,5 @@
 
 * annex.backend=MD5E
 **/.git* annex.largefiles=nothing
-* annex.largefiles=((mimeencoding=binary)and(largerthan=0))
+* annex.largefiles=((mimeencoding=binary)or(largerthan=100kb))
+*.md annex.largefiles=nothing