Support for multiple savepoints
Merge pull request #2000 from janmeier/multipleSavepoints

Support for multiple savepoints
Merge pull request #1994 from seegno/simplify-parameter-validator

Simplify parameter validation and deprecation
Check for an empty validation error message. Closes #2009
[ci skip] Small changes to API docs
Merge pull request #1998 from seegno/add-hstore-array-support

Add hstore array support