Add genv (#2637)

README.md

@@ -273,6 +273,7 @@ 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.
 * [envh](https://github.com/antham/envh) - Helpers to manage environment variables.
 * [gcfg](https://github.com/go-gcfg/gcfg) - read INI-style configuration files into Go structs; supports user-defined types and subsections.
+* [genv](https://github.com/sakirsensoy/genv) - Read environment variables easily with dotenv support.
 * [go-up](https://github.com/ufoscout/go-up) - A simple configuration library with recursive placeholders resolution and no magic.
 * [goConfig](https://github.com/crgimenes/goConfig) - Parses a struct as input and populates the fields of this struct with parameters from command line, environment variables and configuration file.
 * [godotenv](https://github.com/joho/godotenv) - Go port of Ruby's dotenv library (Loads environment variables from `.env`).