Finalize 8.5alpha2 release notes, with updates from Josh Berkus
Finalize 8.5alpha2 release notes, with updates from Josh Berkus

arcivanov/postgres-xl,ovr/postgres-xl,greenplum-db/gpdb,lisakowen/gpdb,oberstet/postgres-xl,greenplum-db/gpdb,adam8157/gpdb,greenplum-db/gpdb,lisakowen/gpdb,adam8157/gpdb,techdragon/Postgres-XL,kmjungersen/PostgresXL,jmcatamney/gpdb,jmcatamney/gpdb,yazun/postgres-xl,ovr/postgres-xl,ashwinstar/gpdb,xinzweb/gpdb,postmind-net/postgres-xl,greenplum-db/gpdb,tpostgres-projects/tPostgres,Postgres-XL/Postgres-XL,xinzweb/gpdb,lisakowen/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,snaga/postgres-xl,adam8157/gpdb,snaga/postgres-xl,yazun/postgres-xl,adam8157/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,kmjungersen/PostgresXL,ovr/postgres-xl,snaga/postgres-xl,arcivanov/postgres-xl,snaga/postgres-xl,adam8157/gpdb,Postgres-XL/Postgres-XL,adam8157/gpdb,50wu/gpdb,ashwinstar/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,xinzweb/gpdb,postmind-net/postgres-xl,pavanvd/postgres-xl,50wu/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,arcivanov/postgres-xl,tpostgres-projects/tPostgres,adam8157/gpdb,Postgres-XL/Postgres-XL,xinzweb/gpdb,greenplum-db/gpdb,kmjungersen/PostgresXL,50wu/gpdb,ashwinstar/gpdb,50wu/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,postmind-net/postgres-xl,xinzweb/gpdb,Postgres-XL/Postgres-XL,yazun/postgres-xl,oberstet/postgres-xl,pavanvd/postgres-xl,xinzweb/gpdb,postmind-net/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,kmjungersen/PostgresXL,jmcatamney/gpdb,zeroae/postgres-xl,lisakowen/gpdb,jmcatamney/gpdb,tpostgres-projects/tPostgres,50wu/gpdb,zeroae/postgres-xl,lisakowen/gpdb,lisakowen/gpdb,ovr/postgres-xl,lisakowen/gpdb,techdragon/Postgres-XL,arcivanov/postgres-xl,snaga/postgres-xl,greenplum-db/gpdb,ashwinstar/gpdb,xinzweb/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,adam8157/gpdb,jmcatamney/gpdb,50wu/gpdb,zeroae/postgres-xl,jmcatamney/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,ovr/postgres-xl,tpostgres-projects/tPostgres,tpostgres-projects/tPostgres,zeroae/postgres-xl,yazun/postgres-xl,zeroae/postgres-xl,pavanvd/postgres-xl,50wu/gpdb,50wu/gpdb,yazun/postgres-xl,arcivanov/postgres-xl,kmjungersen/PostgresXL,postmind-net/postgres-xl,arcivanov/postgres-xl,oberstet/postgres-xl