Drush's own bootstrap is now called preflight and a new DrupalBoot class owns the rest of the bootstrap.
Add a missing file.
Move drush_command_belongs_to_disabled_module() to Drupal's command.inc
Move --early processing after preflight.
Rename Drush's kilobyte constant.
Remove a no-longer-needed return statement.
Add return FALSE statement
Add explicit instructions on how to force base_url to be set for a Drupal site via a drushrc.php file in the site directory.
Touch up README formatting in previous commit.
Do not auto-load a drushrc.php file in the sites directory for aliases referenced for any reason (e.g. sql-sync) -- only sites selected for bootstrapping should load the drushrc.php file.  To change this behavior, explicitly set the 'config' option in the alias record to be a path to a drushrc.php file.
Fix #698. Minor readme improvements.
Merge pull request #696 from jiv-e/issue-694

Add return FALSE statement to drush_sitealias_is_remote_site()
Spelling fix.
#81: Respect --quiet with @sites
Update site alias test expected results
Merge pull request #708 from greg-1-anderson/cron-quiet

#81: Respect --quiet with @sites
Fix #561: Allow for numeric and NULL values to be passed into site-install.
Add static cache to complete.inc to avoid cache HITs (following a SET) breaking tests.
Adjust static quick return position.
Stop warning about emptying config dirs. Hardly anyone will use those Active dir. Maybe we should stop emptying staging but thats a separate issue.