Added .gitattributes file to handle line endings.

Signed-off-by: Anders Hammar <anders@hammar.net>

.gitattributes

@@ -0,0 +1,13 @@
+# 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.
+*.java text diff=java
+*.html text diff=html
+*.jelly text
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.gif binary
+*.jpg binary