+ added search_match_regex()
+ added tests for search_match_regex()
= fixed test for search_match_substr()
= regex parse in search_parse_terms()
* update build system to support optional regexp search
= small fixes in file_tags_get()
+ added file_tags_get_bulk()
* file_tags_get() now wrapper around file_tags_get_bulk()
= speed up the build of tests
= fix mistype in db.h
* turn on db autocreate by default
+ added warning on db creation
+ speedup regex search
~ file_tags_get_bulk()
= fixed memory leak in test
= fixed mistype in test
+ use new search engine in dumb tool