add .gitattributes file

.gitattributes

@@ -0,0 +1,11 @@
+*.jar binary
+
+# Auto detect text files and perform LF normalization
+*        text=auto
+
+*.java   text diff=java
+*.html   text diff=html
+*.xml    text diff=xml
+*.css    text
+*.js     text
+*.sql    text