Merge pull request #61 from matysek/develop

Add sqlite3 hook, fix encodings issue and update license header in tests.
Fix typo in Tree example
Respond to issue #720, clarify operation of the Tree class
Merge pull request #62 from tallforasmurf/develop

Pick up response to issue #720
Merge pull request #63 from matysek/develop

Implement --icon for OSX, add gst hook, fix option --Wignore.
Merge pull request #64 from matysek/develop

Fix None in Python run-time options and add unicode support for exe version info resource on Windows.
Correct typo "tupple" should be "tuple" in version-info output
Enhance documentation of pyi-grab_version and the version info file
Merge pull request #66 from tallforasmurf/develop

Documenting version info and pyi-grab_version