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- Changed the server column position in the extension manager view
- Removed public method getInstalledExtensions from application/models/system/Extensions_model.php
- Fixes, comments and indentations in application/libraries/ExtensionsLib.php
- application/extensions file system permission now is 775
- application/logs file system permission now is 775
- Added extensions directory in application/: config, controllers, helpers, hooks, libraries, models, views and widgets
- Added view views/extensions/manage.php
- Added controller controllers/system/extensions/Manager.php
- Added library ExtensionsLib to manage extensions
- Added model models/system/Extensions_model.php
- Moved code related to print out info from MigrationLib to EPrintfLib