SqlQueryTest: changed to detect whether running the 'genqa' test app or
not, rather than setting a boolean value in the code; and be more
cautious about deleting all rows from all tables (only do this if the
database was empty to begin with!).
README.thirdparty: added license for Gradle 1.6; and a note about GEB,
Spock & Selenium WebDriver; also, in the Apache License Version 2.0,
added a missing carriage return.