Fixing warnings. Added JSONCPP_DEPRECATED definition for clang. Also updating .gitignore to ignore .DS_Store files (Mac OS Finder generated)
diff --git a/include/json/config.h b/include/json/config.h
index b2bfb29..c83e78a 100644
--- a/include/json/config.h
+++ b/include/json/config.h
@@ -120,6 +120,9 @@
#endif
#ifdef __clang__
+# if __has_extension(attribute_deprecated_with_message)
+# define JSONCPP_DEPRECATED(message) __attribute__ ((deprecated(message)))
+# endif
#elif defined __GNUC__ // not clang (gcc comes later since clang emulates gcc)
# if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
# define JSONCPP_DEPRECATED(message) __attribute__ ((deprecated(message)))