DatabaseLib version 3.2.0

Added ScriptRunner utility class. See https://github.com/Exlll/DatabaseLib#scriptrunner for more information.

DatabaseLib version 3.1.0

Added four submit methods, one for each kind of task, that return a CompletionStage. These new methods can be used to write long chains of queries (where one query depends one the result of the previous one) more elegantly.

DatabaseLib version 3.0.0

Update DatabaseLib to version 3.0.0

Breaking changes:
- moved packages to 'sql' package
- removed or renamed some classes
- removed 'new***Task' methods
- removed AsyncLib
    - removed task priorities
- updated ConfigLib to version 2