Add cake console shortcut script
Add shortcut script for running tests
Drop obsolete tables for tags, categories and locations

These tables are replaced by the more generic field table
Fix logger output
Resets user data in session if dependen model was saved
Renamed {Phtagr -> App}Test*.php
Remove logging output in UserSessionListener
Replace USER_DIR by configurable user.home.dir

This improves testability for upload file structure.

Use Configure::write('user.home.dir', '/new/user/dir/') to configure
the base upload directory for user's uploaded files.
Remove debug output