Revise packager for Gallery 3.1.
- change PATH_INFO in index.php (similar to unit test).
- add ORM::reinitialize() before re-installation (similar to unit test).
- revise database connection element names.
- add HTMLPurifier cache to ignored paths for init_var.php generation.
Update install.sql and init_var.php using now-fixed packager.
- updated graphics rules (class name, Image::AUTO integer).
- updated tag module version.
- updated tag table fields.
- add cache directory to init_var.