added gitattributes to disable autocrlf, addressing issue #1234

.gitattributes

@@ -0,0 +1,24 @@
+# Set default behaviour to automatically normalize line endings.
+* text=auto
+
+# prevents git from converting LF to CRLF, which causes issues
+# when assembling example pages on Windows
+data/examples/**/*.js eol=lf
+
+# Denote all files that are truly binary and should not be modified.
+*.ai binary
+*.gif binary
+*.ico binary
+*.jpg binary
+*.mov binary
+*.mp3 binary
+*.mp4 binary
+*.ogg binary
+*.ogv binary
+*.otf binary
+*.pdf binary
+*.png binary
+*.ttf binary
+*.wav binary
+*.webm binary
+*.zip binary