Merge pull request #909 from Kickball/AddHR

Add Admidio #869

README.md

@@ -659,6 +659,7 @@ See https://github.com/n1trux/awesome-sysadmin#distributed-filesystems
 
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+  * [admidio](https://www.admidio.org/) - Admidio is a free open source user management system for websites of organizations and groups. The system has a flexible role model so that it’s possible to reflect the structure and permissions of your organization. ([Demo](https://www.admidio.org/demo/), [Source Code](https://github.com/Admidio/admidio)) `GPLv2` `PHP`
   * [IceHrm](https://icehrm.com/) - IceHrm employee management system allows companies to centralize confidential employee information. ([Demo](https://icehrm.com/demo.php), [Source Code](https://github.com/gamonoid/icehrm/)) `Apache` `PHP`
   * [OrangeHRM](https://www.orangehrm.com/) - OrangeHRM is a comprehensive HRM system that captures all the essential functionalities required for any enterprise. ([Source Code](https://sourceforge.net/projects/orangehrm/)) `GPLv2` `PHP`
   * [Sentrifugo](http://www.sentrifugo.com/) - Sentrifugo is a HRM system that can be easily configured to meet your organizational needs. ([Source Code](https://github.com/sapplica/sentrifugo)) `GPLv3` `PHP`