updated gitignore and gitattributes

.gitattributes

@@ -1,3 +1,9 @@
 * annex.backend=MD5E
 **/.git* annex.largefiles=nothing
-* annex.largefiles=(largerthan=50mb)
+* annex.largefiles=(largerthan=50mb)
+# files should not be annexed
+*.md annex.largefiles=nothing
+*.txt annex.largefiles=nothing
+*.py annex.largefiles=nothing
+LICENSE annex.largefiles=nothing
+datacite.yml annex.largefiles=nothing