Ensure all text files do not accidentally become a CRLF file.

Agreed upon during 5 August 2015 PF Editors concall.

Author: joanmarie

.gitattributes

@@ -1,2 +1,12 @@
-# Ensure aria.html does not accidentally become a CRLF file
-aria.html eol=lf
+# Ensure all text files do not accidentally become a CRLF file.
+# Agreed upon during 5 August 2015 PF Editors concall.
+# To override or prevent this behavior see the following sections.
+* text eol=lf
+
+# Files that will always have CRLF line endings. Example:
+# my-special-spec.html eol=crlf
+
+# Ensure non-text files don't get accidentally swept up by above.
+*.png binary
+*.jpg binary
+*.zargo binary