* Support keyword filtering (records having keywords a and b but not c and d)
* Remove debug statements.
* Left a pass statement by mistake.
* Update cli help to show word list '[...]' after search options.
* Add space after method doc.
* Change cli option '-W --without' to '-x --exclude'
* Add case statements to search_by_tag
* Add subselect so we don't return score column
* update tests to change expected order of results
* Add case statements to searchdb
* Add docstring to wrap_in_case_statement
* Add to comment in search_by_multiple_tags_search_any test
* Switch clause to fragment
* Change case_select variable to case_statement
* Remove wrap_in_case_statement function and use lambda instead
* chg: dev: move new feature to its own function
* chg: test: test copy_to_clipboard func
* chg: test: remove pytest-catchlog
* chg: test: minimum pytest version
* chg: test: add exception on python 3.5&3.6 tests
* new: test: add chrome json test
* chg: test: remove unused json
* chg: dev: use gh uploaded file
* chg: test: parametrize the test
* new: test: chrome no parent tag pickle result file
* new: test: load firefox db test
* chg: test: merge same method on fixture
* fix: dev: false variable name
* chg: test: move zip extractor to its own method
* chg: test: use external zip file for exp result
* fix: test: flake8 fix
* fix: test: use strpath from folder
* fix: test: firefox nopt expected result
* chg: test: remove test data file from repo
* Implement feature "Search multiple tags, exclusion in tag search"
Add failing test for searching any multiple set of tags
Search any tags works; passing tests
Add failing test for searching all multiple tags
Search all tags works
Do not allow combination of search logics
Adds support for tag exclusion search
Update Search Options Group
Update README
Clean up
Fix man/readme language
Fix search_by_tag docstring
Split tags by ' - ' not '-': allows for hyphenation
Remove unnecessary else
Change search_logic lang to search_operator
Update exclusion language in readme and man
Print warning if ',' and '+' are both used in a search
* Add documentation and examples to manpage, improve documentation in README and buku.py
* Enforce space separation of '+' and document
* Fix under-indent in tests that causes build failure
* Add test to check that search_by_tag constructs correct sqlite query; also remove unittest.skips from search_by_tag tests
* Move tag search preparation work into prep_tag_search helper function; add test to test_buku.py
* Use pytest.mark.parametrize for test_prep_tag_search
