add some docs to manager
add some docs to manager

ajayaa/keystone,blueboxgroup/keystone,maestro-hybrid-cloud/keystone,rushiagr/keystone,dstanek/keystone,derekchiang/keystone,promptworks/keystone,ilay09/keystone,blueboxgroup/keystone,cbrucks/Federated_Keystone,vivekdhayaal/keystone,cloudbau/keystone,UTSA-ICS/keystone-kerberos,MaheshIBM/keystone,rodrigods/keystone,dsiddharth/access-keys,cbrucks/Federated_Keystone,rickerc/keystone_audit,rushiagr/keystone,cernops/keystone,citrix-openstack-build/keystone,ajayaa/keystone,townbull/keystone-dtrust,savi-dev/keystone,cloudbau/keystone,savi-dev/keystone,jonnary/keystone,idjaw/keystone,takeshineshiro/keystone,derekchiang/keystone,nuxeh/keystone,rajalokan/keystone,openstack/keystone,jumpstarter-io/keystone,rickerc/keystone_audit,UTSA-ICS/keystone-kerberos,nuxeh/keystone,jamielennox/keystone,ntt-sic/keystone,rushiagr/keystone,openstack/keystone,vivekdhayaal/keystone,rajalokan/keystone,dims/keystone,kwss/keystone,promptworks/keystone,cbrucks/keystone_ldap,jumpstarter-io/keystone,himanshu-setia/keystone,dsiddharth/access-keys,cbrucks/Federated_Keystone,ging/keystone,himanshu-setia/keystone,rickerc/keystone_audit,cernops/keystone,derekchiang/keystone,cbrucks/keystone_ldap,jumpstarter-io/keystone,cbrucks/keystone_ldap,MaheshIBM/keystone,klmitch/keystone,dstanek/keystone,mahak/keystone,jonnary/keystone,klmitch/keystone,kwss/keystone,ilay09/keystone,idjaw/keystone,townbull/keystone-dtrust,roopali8/keystone,sileht/deb-openstack-keystone,mahak/keystone,jamielennox/keystone,reeshupatel/demo,dims/keystone,sileht/deb-openstack-keystone,roopali8/keystone,JioCloud/keystone,townbull/keystone-dtrust,openstack/keystone,mahak/keystone,ging/keystone,citrix-openstack-build/keystone,savi-dev/keystone,dstanek/keystone,ntt-sic/keystone,citrix-openstack-build/keystone,sileht/deb-openstack-keystone,reeshupatel/demo,nuxeh/keystone,promptworks/keystone,cloudbau/keystone,takeshineshiro/keystone,rajalokan/keystone,dsiddharth/access-keys,vivekdhayaal/keystone,reeshupatel/demo,maestro-hybrid-cloud/keystone,ntt-sic/keystone,ilay09/keystone,kwss/keystone,JioCloud/keystone,rodrigods/keystone