Force Unix line endings for text files (only)

This should prevent binary files like .gz from being touched by the LF
endofline conversion.

.gitattributes

@@ -2,17 +2,24 @@
 
 # Explicitly declare text files you want to always be normalized and converted
 # to native line endings on checkout.
-*.css text
-*.js text
-*.json text
-*.html text
-*.php text
-*.cs text
 
 # Declare files that will always have LF line endings on checkout.
+*.css text eol=lf
+*.js text eol=lf
+*.json text eol=lf
+*.html text eol=lf
+*.php text eol=lf
+*.cs text eol=lf
 *.sh text eol=lf
 protractor text eol=lf
 
 # Denote all files that are truly binary and should not be modified
 *.png binary
 *.jpg binary
+*.gif binary
+*.otf binary
+*.ttf binary
+*.woff binary
+*.woff2 binary
+*.7z binary
+*.gz binary