* changed logic of parsing options
= fixed missed newline
= fixed code style
* stat() call in _real_file_update() moved to parent function for later reuse
+ added _handle_file_update_recursive()
+ enabled recursive update option
- parse tags without temp variable in file_tags_get()
+ added comments
* renamed variable in _handle_search_by_tag()
* merged handle of dir and file types in _handle_search_by_tag()
- removed ugly macros in _handle_search_by_tag()
* fixes after change file_tags_get() behaviour
- parse tags without temp variable in db_tags_get()
+ added aux headers in common.h
= fixed improper handling lowercase uuids in uuid_id_parse()
+ added tests for file_uuid_*()