Merge branch '46-set-combination-are-not-semantically-correct' into 'master'

examples/networkdisk-rich-with-helper.py

querybuilder/atoms/clauses.py

querybuilder/drivers/sql/tokenizer.py

querybuilder/drivers/sqlite/specifics.py

querybuilder/drivers/sqlite/tokenizer.py

querybuilder/queries/dql.py

querybuilder/tests/drivers/sql/test_tokenizer.py

querybuilder/tests/drivers/sqlite/test_sqlite_specifics.py

querybuilder/tests/drivers/sqlite/test_sqlite_tokenizer.py

querybuilder/tests/queries/test_dql.py