Log Message:
Upgrade to version 3.6.

Most important change was serious bug in 3.5 that did not allow DB-API 2.0
version to work without a manual change.

Other changes:

  - Better DB-API 2.0 compliance
  - Exception hierarchy moved into C module and made available to both APIs
  - Fix error in update method that caused false exceptions
  - Moved to standard exception hierarchy in classic API
  - Added new method to get transaction state
  - Use proper Python constants where appropriate
  - Use Python versions of strtol, etc.  Allows WIN32 build
  - Bug fixes and cleanups