Rationalise all the line endings

.gitattributes

@@ -1,6 +1,16 @@
-text=auto
+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
+# Explicitly declare text files you want to always be normalized and converted
+# to native line endings on checkout.
 *.java text
-*.txt text
 *.md text
-*.MF text
-*.xml text
+*.txt text
+*.xml text
+*.properties text
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary
+*.exe binary
+**/modbus/native/** binary