QML API 1.2: Fix importModule() behavior. Fixes #3

This changes the behavior of an existing function, so we need to
bump the QML import version to still support code that depends on
the old (broken) behavior of the importModule() function.
Fix building with GCC 4.6 on Ubuntu

const-ness fix for the call to PyImport_ImportModuleEx and
rename major/minor to avoid clashes on some systems due to
sysmacros.h #define'ing minor and major.
Docs: QML import examples should always use latest API version
QML API 1.2: Handle JS exceptions in callbacks from Python

Also improve error message in pyotherside.send() callback handler
to include filename and line number.
Converter: Support for date, time and datetime. Fixes #12

Python datetime.date <-> Qt QDate <-> QML date
Python datetime.time <-> Qt QTime <-> QML time
Python datetime.datetime <-> Qt QDateTime <-> JS Date

Python C API docs for those data types:
http://docs.python.org/3/c-api/datetime.html

QML docs for those data types:
http://qt-project.org/doc/qt-5.1/qtqml/qtqml-cppintegration-data.html#qdatetime-to-javascript-date
http://qt-project.org/doc/qt-5.1/qtqml/qml-date.html
http://qt-project.org/doc/qt-5.1/qtqml/qml-time.html
PyOtherSide 1.2.0
Merge tag '1.2.0'
[packaging] New upstream version 1.2.0