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
Include auto-detection of RAM size on OS X.

Call `sysctl hw.memsize` and parse the result, which seems
to be the simplest way to find this information on OS X.
Merge pull request #3 from schmiddy/osx_get_memory

Include auto-detection of RAM size on OS X.
Proofreading fixes for documentation and code issues.

Closes #4.
Merge branch 'master' of github.com:gregs1104/pgtune
Merge pull request #1 from gregs1104/master

latest from upstream