Fixed bug where if no-backup option was present, files were never deleted from projects.
Fix #819. Document how to install for all users on a server.
Fix code comments.
Merge pull request #797 from mortenson/no-backup-remove-files

Fixed bug where if --no-backup was provided, files were never deleted from projects.
Remove pointer to drupal.org/project/drush
Uppercase Drush
When saving root to context system, use realpath()

This resolves the root when you provide a relative path on the CLI like: drush -r ./d7
Fix prior commit. Don't set a value for DRUSH_SELECTED_DRUPAL_ROOT unless you have a root.
Adds the creation time of the extension's .info file to projects. Similar to what update.module does.
Improvements to the update service xml parser to pick also release terms.
Add a drush backend to update_status engine. This backend is independent of update.module.
Fix typos.