First draft of adding event to allow dynamic commercial updates and
installs
Simplified version, always fire onInstallerBeforeDownloadPackage event
before downloading a package
Even simpler, removed unused params
Restored mistakenly removed comments from original Joomla! code
Merge branch 'staging' into auth_update
Merge remote-tracking branch 'joomla-cms/staging' into auth_update
Merge pull request #2769 from shumisha/auth_update

Improved Joomla! extensions update handling of paid for extensions
Codestyle fixes