Adding Oxidized

Adding Oxidized a network configuration management tool.

README.md

@@ -273,6 +273,7 @@ A curated list of amazingly awesome open source sysadmin resources inspired by [
 *Network configuration management tools.*
 
 * [GestióIP](http://www.gestioip.net/) - An automated web based IPv4/IPv6 IP Address Management tool.
+* [Oxidized](https://github.com/ytti/oxidized) - A modern take on network device configuration monitoring with web interace and GIT storage.
 * [RANCID](http://www.shrubbery.net/rancid/) - Monitors network device's configurarion and maintain history of changes.
 * [rConfig](http://www.rconfig.com/) - Another network device configuration management tool.