Add .gitattributes file to help maintain proper newlines.

.gitattributes

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+# Using default template from https://help.github.com/articles/dealing-with-line-endings with modifications.
+# 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
+*.php text
+*.inc text
+*.sh text
+*.h text
+*.md5 text
+*.sha256 text
+*.conf text
+*.xml text
+*.ovf text
+*.css text
+*.htm* text
+*.js text
+*.diff text
+*.patch text
+*.pl text
+*.rules text
+*.txt text
+rc.* text
+*.sql text
+*.mk text
+
+# Files that will always have CRLF line endings on checkout. (Not sure we have any of these)
+# *.dos text eol=crlf
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary
+*.gif binary
+*.so* binary
+*.gz binary
+*.tgz binary
+*.exe binary
+*.ico binary
+*.img binary
+*.zip binary
+*.uzip binary
+*.tar binary
+*.ttf binary