adding instructions for setting up openldap on ubuntu
adding instructions for setting up openldap on ubuntu

RevoTechnology/devise_ldap_authenticatable,cschiewek/devise_ldap_authenticatable,simplybusiness/devise_ldap_authenticatable,alde/devise_ldap_norm,cschiewek/devise_ldap_authenticatable,Datacom/devise_ldap_authenticatable,GracepointMinistries/devise_ldap_authenticatable,labzero/devise_ldap_authenticatable,simplybusiness/devise_ldap_authenticatable,houston/devise_ldap_authenticatable,labzero/devise_ldap_authenticatable,cgservices/devise_ldap_authenticatable,houston/devise_ldap_authenticatable,houston/devise_ldap_authenticatable,GracepointMinistries/devise_ldap_authenticatable,alde/devise_ldap_norm,cschiewek/devise_ldap_authenticatable,simplybusiness/devise_ldap_authenticatable,Eric-Guo/devise_ldap_authenticatable,labzero/devise_ldap_authenticatable,Datacom/devise_ldap_authenticatable,Eric-Guo/devise_ldap_authenticatable,alde/devise_ldap_norm,cgservices/devise_ldap_authenticatable,Eric-Guo/devise_ldap_authenticatable,cgservices/devise_ldap_authenticatable,GracepointMinistries/devise_ldap_authenticatable,Datacom/devise_ldap_authenticatable,RevoTechnology/devise_ldap_authenticatable