Add .gitattributes to normalize line endings

.gitattributes

+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
+# Files with Unix line endings
+*.c   text eol=lf
+*.cpp text eol=lf
+*.h   text eol=lf
+*.ino text eol=lf
+*.py  text eol=lf
+*.sh  text eol=lf
+
+# Files with native line endings
+# *.sln text
+
+# Binary files
+*.png binary
+*.jpg binary
+*.fon binary
+