Initial RSS re-add and removed hardcoded strings

buildconfig/BuildConfig.cpp.in

@@ -42,6 +42,7 @@ Config::Config()
 
     VERSION_STR = "@Launcher_VERSION_STRING@";
     NEWS_RSS_URL = "@Launcher_NEWS_RSS_URL@";
+    NEWS_OPEN_URL = "@Launcher_NEWS_OPEN_URL@";
     IMGUR_CLIENT_ID = "@Launcher_IMGUR_CLIENT_ID@";
     MSA_CLIENT_ID = "@Launcher_MSA_CLIENT_ID@";
     META_URL = "@Launcher_META_URL@";