Add a git attributes file that allows native file ending checkout

This makes it easier for people to contribute from different
OS platforms.

See also https://help.github.com/articles/dealing-with-line-endings/

Author: dietmarw

.gitattributes

@@ -0,0 +1,14 @@
+# Set default behaviour, in case users don't have core.autocrlf set.
+* text=auto
+
+# Explicitly declare text files we want to always be normalized and converted
+# to native line endings on checkout.
+*.c text
+*.h text
+*.mo text
+*.mos text
+*.order text
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary