Tweak git default behavior for windows machines

.gitattributes

@@ -1,9 +1,16 @@
 #
 # https://help.github.com/articles/dealing-with-line-endings/
 #
+
+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
 # Linux start script should use lf
 /gradlew        text eol=lf
 
 # These are Windows script files and should use crlf
 *.bat           text eol=crlf
 
+*.png binary
+*.jpg binary
+*.gif binary