Did minor code cleanup.

cleanup: misc documentation and API cleanup
bugfix: added false indentation to non draggable items so the end user won't be confused

feature: display full taxonomy select option list with greyed elements instead of hiding locked elements
bugfix: removed some error messages due to wrong SQL queries

api: do no use hook_taxonomy() anymore, aggressive mode has is use no nore
api: there is no per-vocabulary lock enabling, all are enabled per default
cleanup: .theme and .admin.inc files added