no one uses macports
no one uses macports

update the dev docs for OS X to use Homebrew instead of macports, and
reflect the necessary dependencies for 10.9 Mavericks (2013) instead of
10.7 Lion (2011).

Change-Id: Ia1a06a15b9f03777fe9d3e77a37eb395f15a4706

cernops/keystone,blueboxgroup/keystone,UTSA-ICS/keystone-kerberos,blueboxgroup/keystone,rajalokan/keystone,ging/keystone,klmitch/keystone,cernops/keystone,mahak/keystone,rajalokan/keystone,ajayaa/keystone,promptworks/keystone,rodrigods/keystone,vivekdhayaal/keystone,himanshu-setia/keystone,jumpstarter-io/keystone,mahak/keystone,rushiagr/keystone,dstanek/keystone,UTSA-ICS/keystone-kerberos,ilay09/keystone,dims/keystone,jonnary/keystone,jumpstarter-io/keystone,promptworks/keystone,rushiagr/keystone,openstack/keystone,jamielennox/keystone,promptworks/keystone,jumpstarter-io/keystone,nuxeh/keystone,vivekdhayaal/keystone,takeshineshiro/keystone,ilay09/keystone,reeshupatel/demo,ilay09/keystone,maestro-hybrid-cloud/keystone,dstanek/keystone,reeshupatel/demo,MaheshIBM/keystone,MaheshIBM/keystone,idjaw/keystone,dstanek/keystone,reeshupatel/demo,jamielennox/keystone,roopali8/keystone,takeshineshiro/keystone,nuxeh/keystone,jonnary/keystone,mahak/keystone,maestro-hybrid-cloud/keystone,rushiagr/keystone,idjaw/keystone,nuxeh/keystone,ajayaa/keystone,openstack/keystone,ging/keystone,klmitch/keystone,himanshu-setia/keystone,openstack/keystone,vivekdhayaal/keystone,roopali8/keystone,rajalokan/keystone,dims/keystone,rodrigods/keystone