Enhancements:

• Enable build with PostgreSQL 9.3.

Bugfixes:

• Fix error ORA-01406: fetched column value was truncated caused by timestamps with precision greater than 6.
  Per report from David E. Wheeler.
• Fix crash with IN lists that do not entirely consist of constants.
  Per report from Wang Dong.
• Fix handling of parameters during pushdown of WHERE conditions.
  The previous implementation returned incorrect results for certain queries like SELECT ... WHERE colname = (SELECT ...)
  ATTENTION: Since correct handling of parameters is not possible before PostgreSQL 9.2, query parameters will not be pushed down in PostgreSQL 9.1.
  This is a regression for cases where this happened to work.
• Fix a logical error that can lead to incorrect Oracle WHERE clauses.
• Fix a bug that can lead to the incorrect omission of a scan clause, leading to wrong results.