add ingo config utility

README.md

@@ -172,6 +172,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
 * [envconfig](https://github.com/vrischmann/envconfig) - Read your configuration from environment variables.
 * [gcfg](https://github.com/go-gcfg/gcfg) - read INI-style configuration files into Go structs; supports user-defined types and subsections
 * [gofigure](https://github.com/ian-kent/gofigure) - Go application configuration made easy
+* [ingo](https://github.com/schachmat/ingo) - Flags persisted in an ini-like config file
 * [ini](https://github.com/go-ini/ini) - Go package for read and write INI files
 * [mini](https://github.com/FogCreek/mini) - A golang package for parsing ini-style configuration files
 * [store](https://github.com/tucnak/store) - A lightweight configuration manager for Go