operations-portal-users

- Change the tab name from VO information to VO management

- Add new first page with following information

- Introduction:
Virtual Organisation (VO) is a group of people (e.g. scientists, researchers) with common interests and requirements, who need to work collaboratively and/or share resources (e.g. data, software, expertise, CPU, storage space) regardless of geographical location. They join a VO in order to access resources to meet these needs, after agreeing to a set of rules and Policies that govern their access and security rights (to users, resources and data).
This page provides references to documentation related to Virtual Organization management. In case of questions please contact EGI User support group <support@egi.eu>

- Link to VO managers documentation https://wiki.egi.eu/wiki/User_Documentation