Fix buggy 1MB cap on maintenance_work_mem
Cleanup of documentation, project plan
Add a Platform input and cleanup the model.
Adjusts shared_buffers, max_connections, checkpoint_segments, wal_buffers.
Clamp shared_buffers to 512MB on Windows.
Tweak connection count, checkpoint_segments for the various models.
Move maintenance_work_mem limit to 2GB.
Tune wal_buffers using the same scheme introduced in 9.1.
Merge branch 'master' of github.com:gregs1104/pgtune